India-CMS Newsletter Member Institutes/ Universities of India-CMS

Vol 1. No. 1, July 2015 1. Nuclear Physics Division (NPD) Bhabha Atomic Research Center (BARC) Mumbai http://www.barc.gov.in/

First volume produced at: 2. Indian Institute of Science Education and Research (IISER) Department of Physics Pune http://www.iiserpune.ac.in Panjab University Sector 14 Chandigarh - 160014 3. Indian Institute of Technology (IIT), Bhubaneswar Bhubaneswar http:// www.iitbbs.ac.in

4. Department of Physics Indian Institute of Technology (IIT), Bombay Mumbai http://www.iitb.ac.in/en/education/academic-divisions

5. Indian Institute of Technology (IIT), Madras Chennai https://www.iitm.ac.in

6. School of Physical Sciences National Institute of Science Education and Research (NISER), Edited and Compiled by: Bhubaneswar http://physics.niser.ac.in/

Manjit Kaur Department of Physics 7. Department of Physics Panjab University Panjab University Chandigarh Chandigarh http://physics.puchd.ac.in/ [email protected] 8. Division of High Energy Nuclear and Particle Physics Ajit Mohanty Saha Institute of Nuclear Physics (SINP) Director Kolkata http://www.saha.ac.in/web/henppd-home Saha Institute of Nuclear Physics (SINP) Kolkatta 9. Department of High Energy Physics [email protected] Tata Institute of Fundamental Research (TIFR), Mumbai http://www.tifr.res.in/ ~dhep/ Abhimanyu Chawla Department of Physics 10. Department of Physics & Astrophysics Panjab University University of Delhi Chandigarh Delhi http://www.du.ac.in/du/index.php?page=physics-astrophysics [email protected] 11. Visva Bharti Santiniketan, West Bengal 731204 http://www.visvabharati.ac.in/Address.html

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Contents

Message ...... 3 Message ...... 5 Message ...... 6 India-CMS Constitution ...... 7 India-CMS Constitution and Guidelines ...... 7 Annexure - I ...... 8 Annexure - II ...... 9 Section A: ...... 9 Section B: ...... 10 Guidelines for Evaluating the Proposal from a New Group ...... 11 Section A: ...... 11 Section B: ...... 11 Regarding Budget ...... 11 India-CMS Logo Competition ...... 12 Fabrication, Testing and Installation of CMS Detector Components by Indian Groups ...... 13 I. HO Electronics ...... 13 II. Hadron Calorimeter (HCAL) Upgrade ...... 14 III. Resistive Plate Chambers (RPCs) ...... 15 IV. Future Hardware Activities ...... 16 The GEM upgrade for the high eta region for the Long Shut Down -2 (2017-2020) ...... 16 India-CMS in CMS Phase II Tracker Upgrade ...... 16 Tier2 Center of India for the CMS Experiment...... 17 Publications ...... 18 Contribution of Indian Groups to CMS Physics ...... 18 Awards / Achievements / Distinctions (under the India-CMS umbrella) ...... 25 Students who completed Ph.D. from 2010-2015 (During LHC 7-8 TeV) ...... 26 Students currently enrolled for Ph.D...... 27 New Faculty / Institutes ...... 50 Contact Information for India-CMS Members ...... 51 Election of India-CMS Spokesperson for the term 2015 – 2017 ...... 55

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Announcement of India-CMS Spokesperson and Deputy Spokesperson ...... 55

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Message

Prof. S. N. Ganguli

India-CMS Spokesperson (1998 - 2002) email: [email protected]

The Indian participation in accelerator based experiments has grown over the last three decades or so starting with the L3 experiment at the Large Electron Positron (LEP).

LEP collider at CERN, Geneva, in the early 1980s, the D Zero experiment at the Tevatron accelerator of the Fermilab in the early 1990s and heavy-ion collision based experiments in the mid 1980s at CERN and RHIC. So far the Standard Model of particle physics based on electroweak theory and QCD has been able to describe very successfully high energy particle interactions. But the Standard Model implies the existence of a scalar particle called Higgs boson which is expected to give mass to elementary particles. Direct searches at LEP led to a lower limit on the Higgs mass as 114 GeV. The Large Hadron Collider (LHC) at CERN is constructed to explore higher mass region with two very high energy proton beams colliding head-on at four designated locations surrounded by huge detectors. Two of them CMS and ATLAS are general purpose detectors to study proton-proton as well as lead-lead collisions.

The proposal for the LHC machine was made in 1984 and the project was approved in 1994 by the CERN council along with two major detectors CMS and ATLAS. Five Indian groups joined the CMS experiment during 1993-1994: two groups from TIFR (EHEP and HECR) and one group each from BARC, Delhi University and Panjab University (IOP, Bhubaneswar, was initially a member of this collaboration, but later they joined ALICE) . A two day meeting was organized at TIFR in November 1994 to discuss strategy of Indian participation in the CMS; many particle and nuclear physicists also attended the meeting. It resulted in the formation of India-CMS collaboration with the following steering committee members: S. N. Ganguli, S. K. Kataria, J. M. Kohli, V. S. Narasimham and R. K. Shivpuri. The Indian groups desired to participate in three sub-detectors of CMS: Hadron Barrel Calorimeter Outer (HBO), pre shower silicon detector and MSGC. Task of drafting this proposal was carried out by A. Gurtu. The proposal was presented to our funding agencies DAE and DST; these meetings were chaired by Dr. R. Chidambaram, Chairman of AEC. Finally, the Indian participation was confined to HBO and preshower silicon detector. A detailed R&D on these two sub-detectors started with technical coordinators as: N. K. Mondal for HBO and S. K. Kataria for the pre- shower silicon. Modules of pre-production prototype were rigorously beam tested at CERN, and then only the collaboration went for the production phase. K. Sudhakar took over as the technical coordinator for HBO in the production phase.

The other aspects of the experiment – detector simulation and participation in the creation of a global computing infrastructure GRID and the preparation for physics analyses – also progressed steadily. It took nearly fifteen years to complete the LHC and the CMS as well as the ATLAS detector. Let us end by acknowledging the outstanding performance of the LHC machine which delivered nearly 30 fb-inverse of data by the year 2012 at 8 TeV collision energy leading to the discovery of the Higgs by the two experiments CMS and ATLAS.

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Message

Prof. Atul Gurtu

India-CMS Spokesperson (2003 - 2011)

Dear Friends,

It really gives me immense pleasure to see that India-CMS is going to bring out a newsletter twice a year. The need for dissemination of such information outside the restricted community of India-LHC collaborations has long been felt and discussed within the Task Force nominated by the Indian funding agencies DAE and DST. So, it’s truly gratifying to see a newsletter finally seeing the light of day.

Being the first issue, I take the liberty of giving at some length the history of India-CMS. It may be news to many that the very first Indian group to join CMS was IOP, Bhubaneswar! This was in 1993. Shortly thereafter the EHEP group of Tata Institute, Panjab University and Delhi University groups joined, followed by HECR-TIFR. Sometime in between, the IOP group was persuaded to join the India-ALICE and exit India-CMS. The last of the five core groups, the BARC group, joined in 1999. These groups (2 from TIFR, BARC, PU, DU) were responsible for carrying out the major hardware fabrication for CMS for the outer hadron calorimeter (HO) and the Silicon Pre-shower Detector (Si- PSD). TIFR and PU groups were responsible for the HO and BARC and DU groups for Si-PSD. The Visva-Bharati group joined in 2003 and more groups have joined recently.

Let me mention the physics importance of these detectors. For this, one recalls the two major goals of the LHC experiments CMS and ATLAS: discovery and study of the Higgs and search of new physics. The Si-PSD helps in Higgs search as it enables to distinguish direct high energy photons coming from Higgs decay from photons from pi-zero decays. The HO detector enables more precise determination of the missing transverse energy in an event, which is a prominent signature of most new physics. It was recognized early on that the CMS detector is “thin” in the central region, i.e., there is not sufficient material to be able to contain hadronic showers. Thus, measurement of missing energy would not be so accurate. Adding two additional scintillator detector layers outside the main hadron calorimeter improves the missing energy resolution.

For the HO, major R&D effort was carried out and the layout optimized after studying results from many beam- tests were carried out on proto-types. For Si-PSD, silicon strip detectors had to be developed for the very first time in the country. A lengthy and painstaking R&D program using facilities at CEERI, Pilani, and later at BEL, Bangalore was initiated and carried to success at BEL. For this a prominent role was played by the Technical Coordinators, N. K. Mondal for HO and (Late) S.K. Kataria for Si-PSD. Unfortunately Dr. Kataria passed away very shortly after his retirement in 2006 and did not live to see the fruits of his dedicated leadership. BEL was so successful in delivering quality detectors that CMS placed a separate commercial order for making up the shortfall due to inability of another group in providing their share of detectors.

All the hardware was in place and tested and calibrated as per LHC and CMS schedule. An unforeseen problem was encountered with the read-out system of the HO which was based on HPDs (Hybrid Photo Detectors). The (American) groups responsible for developing this picked the best option available at the time (HPD) and carried out all the relevant tests that could be thought of, including performance in magnetic fields. They tested at the

7 highest field expected (4 Tesla). Unfortunately, the HO read-out boxes are placed inside the muon chamber gaps where the field is a fraction of the maximum, and it just so happened that HPDs give a discharge at intermediate fields! Thus some parts of the HO system had to be shut down and some operated at lower than optimum voltage during the first run. During the current LHC shutdown the HPDs for HO are being completely replaced by the new Silicon Photo-Multipliers, so that the HO will become fully operational when LHC restarts in 2015. As luck would have it, till now the LHC has operated at 8 TeV at which showers are better contained within the standard CMS hadron calorimeter. When the higher energy of 14 TeV becomes available in 2015, the HO will be fully functional to play its designated role.

Apart from these major hardware activities, India-CMS set up a Tier-2 Regional Computing Centre at TIFR catering to the needs of CMS computing. A direct 1.5 Gbps connection to CERN caters to the connectivity needs of both India-CMS and India-ALICE. The domestic networks are now those provided by NKN.

As part of CMS-RPC up-scope, BARC and PU groups are fabricating RPCs for the forward-backward systems and these are being installed currently. This has led to the addition of another detector technology to the country, in the form of Bakelite RPCs.

On the management front too, things have evolved. India-CMS now has its own Constitution and elections are held every two years to elect a new Spokesperson.

I want to mention another very important aspect: that of human resource development. I remember always being embarrassed to be told in budget committees etc, that the funding agencies are spending so much public money on these LHC experiments. Where is human resource development? After you people retire where are the younger people to replace you and ensure that the funding was well justified. Well, many years later, I say with some satisfaction that the situation has actually improved. A few years back I remember reporting in meetings that we have 24 staff members in India-CMS. Today we count 40. It’s true that some groups gave got depleted, but other groups have more than made up. And more and more groups are joining India-CMS as well as India-ALICE. In place of the original 5 core groups, we have 9 groups! And more are in the pipe-line awaiting admission. One only hopes that this trend continues in the future. There is much exciting science to be done at the LHC and in particle physics. And, as I keep reminding at Technical Institutes, in addition to front ranking science, there is enormous scope in experimental particle physics for cutting edge contributions from many fields: materials sciences and fast instrumentation for detectors, every computing and IT related subject.

I wish every success to India-CMS and India-ALICE in particular, and to Indian science in general for continuing to do good work and expanding the reach of science within society. This has been set in motion with the eye-catching discovery of the Higgs at the LHC.

Finally, before closing, I want to acknowledge unstinted support from the funding agencies, DAE and DST, the leadership of the first India-CMS Spokesperson, Prof Som Nath Ganguli, who retired in end-2002, and initial group leaders, also now retired: R. K. Shivpuri (DU), J. M. Kohli (PU), V. S. Narasimham (TIFR-HECR) and S. K. Kataria (BARC). I also want to acknowledge enormous contributions from all the engineering, technical and other support staff members, who put in long and strenuous hours in making the project a success. And, last but not least the efforts of the hard working research scholars, many now excellent physicists in their own right.

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Message

Prof. Kajari Mazumdar

India-CMS Spokesperson (2011 - 2013 ) email: [email protected]

It is pleasure to note few things about India-CMS on the occasion of this Newsletter. We are always proud to be part of the LHC family as well as members of the India-CMS collaboration. It gives us a sense of togetherness to do our Science in a Big way in spite of our diversity. The feeling of oneness provides the sustenance to carry on our research in experimental high energy physics which is a ball-game complete different than other fields. Since the Sun never sets in LHC-world, the LHC collaboration has changed our lifestyle considerably to be able to cope up with the difference in time zones, the physical distance between India and the center of the activity as well as the digital divide in terms of connectivity in practical sense. The responsibility to steer the India-CMS collaboration came upon me quite unexpectedly and I did not have very clear idea about what all needed to be done as a contact/liaison person from India for our country in a big experimental collaboration like CMS at LHC. But when the call came I took up the job and gave my best. The hurdles at times looked bothersome, but could be overcome with kind support of the colleagues in the collaboration and efforts from various fronts. I am very thankful for this. One of the immediate realizations was that we, from India, are lucky to be funded reasonably well to do our science. It also brought in the sense of individual responsibility to deliver well, within constraints. I had to spend some time to understand the financial aspects of the participation, to be able to prepare budget proposals for the 12th plan period. The preparation in DAE institutes started early enough and the first draft of the combined budget proposal for India-CMS collaboration was ready by the end of 2011. This proposal of course had several amendments by the time it got approved in mid-2014. The India-CMS collaboration is a loosely bound system of various groups funded by DAE and DST. Thereby the individual groups have reasonable freedom to choose their course and mode of contribution to the CMS experiment within the purview of India-CMS collaboration. But the underlying coherence was remarkable when it came to improving the general features of the collaboration. A more transparent way of decision making and in the workings of the collaboration was brought in. The Executive Committee of India-CMS collaboration was dissolved; all the scientists participated in deliberations. We discussed about the course of action as a whole when deemed necessary. Various information, be it about the developments in the LHC, the CMS experiment or issues regarding physics were being informed to all the members, including the students. A balanced picture of all the achievements and the contributors were projected at every opportunity. A committee for drafting the constitution of the India-CMS collaboration was formed during first quarter of 2011 and after several deliberations of the members; the constitution was presented and discussed openly in detail among the scientists. This was then submitted to the DAE-DST monitoring committee as well. For some time we had physics meetings conducted via internet regularly. This have to restarted to be able to maximize the utility of local experts in the country and to train the students better. Ultimately our impact in the collaboration is bound to be more visible. The presentations and materials for physics meetings, conferences/workshops held are anyway made available on the web and advertised. I think this helps the newcomers who are initially shy and struggle with the complexity of the experiment. We also made the Tier2 Grid Computing center and the Tier3 facility at TIFR useful for analyses by individuals by hosting simulation and collision data, needed for the Indian community. Sufficient storage space is also provided for individual analyzers. The hindrance has been the relatively low bandwidth within the country to

9 connect to TIFR-T2. With increasing bandwidth in near future the utility of the T2 and the T3 for Indian users is expected to be much better in Run2 phase of LHC. The T2 is able to perform well at the CMS front because of dedicated link between Mumbai and CERN. We have now Grid certificate authority within the country which reduces the time needed for issuing new certificates or for renewal. As often said one has to be really lucky these days to experience the history of particle physics in the making. It is not very often that a new facility of high energy physics comes alive for doing science. The period of 2011 to 2013 was extremely significant in the life of everybody associated with the LHC. I was lucky to be handling of some of the affairs in this context. There were lot of excitements as Run1 data continued to pour in; during 2012 the centre of mass energy of LHC was increased from 7 TeV to 8 TeV and the instantaneous luminosity kept increasing. As a consequence the collaboration analyzed data as a sprinter and then in marathon mode; allowed mass range for the Higgs particle continued to shrink, the first hints of a resonance finally culminated in the announcement of the discovery of the Higgs boson. Within the collaboration the news was out few days before the scheduled announcement on 4 July, 2012. We prepared statements in Hindi and other regional languages to be put up on CMS official website as well as for the local media. Several hundred people across the world tuned to the video sessions to learn about announcement of the discovery. The discovery changed the way civilization now understands the science the early universe. We did reach out to the public explaining the LHC and the Higgs phenomenon as much as we could. The Nobel Prize for physics in 2013 to some of the proponents of the mechanism for the electroweak symmetry breaking was an acknowledgement of the triumph of human intellect: a hypothesis made 50 years ago getting confirmed at the LHC. Basking in the glory, we learnt to defend our case for appreciation and continuation of support for basic research. We look forward for more discoveries in future operations of the LHC. India has a long tradition of research in particle physics and the thrust of the LHC has made our task of increasing the strength and the quality of High Energy Physics community in India easier. The enthusiasm in the country is evident from the increase in the number of people from India associated with the experiments at LHC. The LHC roadmap is drawn already for next two decades and India is preparing to participate in all aspects of the future operations of the LHC in a bolder way. Working in cohesion we can bring more glory to India. From past experience we realized that we must form an Indian team from participating groups for specific analyses to be able to lead the related efforts all the way to the publication in journal. This will help in better identification of our contribution in CMS physics.

Long live India-CMS collaboration!

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India-CMS Constitution

Final Version Adopted on:4th April, 2013 during India-CMS faculty meeting at TIFR

Members of Drafting Committees: Prof. Sudeshna Banerjee, TIFR, Mumbai Prof. Brajesh Choudhary, Delhi University, Delhi Prof. R. K. Choudhury, BARC, Mumbai (Retired & replaced by Prof. A. K. Mohanty) Prof. Ajit Mohanty, BARC, Mumbai Prof. Manjit Kaur, Panjab University, Chandigarh

India-CMS Constitution and Guidelines

Preamble: This document defines the structure and governance for the members of the CMS collaboration from Indian institutions. The Indian membership of CMS is designated as the India-CMS Collaboration. The India-CMS collaboration consists of the physicists from high energy particle physics and nuclear physics research groups at Indian universities and national laboratories who are committed to doing physics research at the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) located at CERN, Geneva, Switzerland. It forms the Indian component of the CMS collaboration which consists of over 41 countries throughout the world. The CMS experiment is presently collecting data from proton-proton and heavy ion collisions at ultra-relativistic (TeV) energies. There is a similar India-ALICE collaboration which also has multi- institutional participation. The present participating institutions (full members and Associate members) are given in Annexure I. The purpose of the India-CMS collaboration is to facilitate the participation of Indian physicists in the CMS experiment at the LHC in building detector hardware and R&D, in its operation, analysis and publication of physics results derived from data collected by the CMS experiment, and the upgrade of the CMS sub-detectors for future runs. The India-CMS collaboration is participating in the overall activities of the CMS collaboration. In addition, the India- CMS Collaboration, through its general body consisting of all faculty members, will decide on the scope and direction of all activities that are carried out in the name of India CMS. The Constitution of the India CMS Collaboration is a guideline document but its provisions are binding on the members of the collaboration.

Collaboration organization: The faculty, research staff and students from the participating institutions form the total membership of the collaboration. The voting members of the collaboration are faculties and scientists who are registered at CERN and have served CMS for at least one year. Engineers, technicians, and students in the collaboration, do not have voting rights. Each organization nominates a Team Leader and a Deputy Team Leader to coordinate its activities. They have to be members of the CMS collaboration, registered in the CMS secretariat at CERN.

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Within the India-CMS collaboration, a Spokesperson is elected to serve as the nodal person to carry out overall coordination with CERN as well as with the Indian funding agencies.

Spokesperson: The Spokesperson is elected by the voting members of the India-CMS collaboration. The term of the Spokesperson will be for two years. An individual can be elected for a maximum of two terms as the Spokesperson in his/her entire career. Under no circumstances one person can serve for more than two terms.

The Spokesperson will be elected through a process which is defined below:

 Any voting member of the collaboration can nominate another voting member for the position of the Spokesperson. The nomination should be then seconded by another voting member.  The election of the Spokesperson will be carried out by an Election Committee which will be constituted with one member from each institute/university in the India-CMS collaboration. The committee has to be formed in the India-CMS meeting preceding the meeting in which election will be held. The election process will be completed at least three months before the expiry of the term of the current Spokesperson.  During one of the meetings of the India-CMS collaboration the election will be held through secret ballot and eligible voters present will vote.  Eligible members who are unable to attend the meeting can nominate any other person attending the meeting to vote on their behalf. This information has to be given to the election committee and to every voting member.  If someone who is unable to attend the meeting and does not wish to nominate anyone to vote as proxy on their behalf, s/he can send her/his vote in a sealed envelope through another colleague or by speed post and the envelope can only be opened at the time of vote counting. An e-mail should be sent to all voting members telling how the vote is being sent.  S/he will be allowed to vote through e-mail, sent to every other voting member of the collaboration.  The result of the election will be announced in presence of all the voting members, right after the election – after a suitable period of time which will be taken to count the votes.

For any reason, if the Spokesperson leaves CMS and the India-CMS collaboration before her/his term expires, the Deputy Spokesperson will take over as the Spokesperson for the remaining time. If the remaining time left is more than a year and a half out of the two year term then the term will count as full term for the person taking over as the Spokesperson and s/he will be eligible for one more term only as the Spokesperson. In the same spirit, no individual who is to retire within half the term of eligibility of perceived taking over as Spokesperson will be eligible for the position.

Deputy Spokesperson: The collaboration will nominate a Deputy Spokesperson to assist the Spokesperson in handling his/her duties. His/her term will be concurrent with the Spokesperson. No one can hold the post of Deputy Spokesperson for more than two terms during the entire career. For the present term (2013-15) the Deputy Spokesperson should be nominated by the voting members of the India-CMS collaboration in the next India-CMS meeting and the term will end with the present term of the Spokesperson. From the next term the Deputy spokesperson will be nominated together with the Spokesperson.

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If for any reason the Deputy Spokesperson leaves the India-CMS collaboration before her/his term expires, the senior most Professor or Scientist in a similar rank as the Professor will be nominated as the Deputy Spokesperson. If the remaining time left is more than a year and a half out of the two years then the term will count as full term for the person taking over as the Deputy Spokesperson and s/he will not be eligible for another term as Deputy Spokesperson.

Collaboration Meetings: There will be at least three collaboration meetings in a year, chaired by the Spokesperson or the Deputy Spokesperson. Members are encouraged to attend the meetings and present the progress in their work. There should be presentations from all the individual organizations on the status of the CMS related project taken up by them. Physics presentations should also be made to summarize the results of data analyses that are being carried out.

Physics Analysis Presentations: Apart from the Collaboration meetings, the Spokesperson/Deputy-Spokesperson or their nominee are encouraged to organize open Vidyo presentations on a regular basis to discuss the results of the physics analyses that are being done by the members. This may be done on a fixed day, at a fixed time, pre-decided to suit the convenience of collaborators from across India and those working at CERN.

Induction of New Member Organization: New organizations willing to join the collaboration as members can write to the Spokesperson and join the collaboration after meeting the requirements as enunciated in the document for induction of new members. The details are given in Annexure II.

Deputations to CERN: The deputation proposals to CERN for data taking shifts, M&O tasks, and physics analysis related work are discussed in the joint DAE-DST CMS-ALICE Task Force Committee meetings, held twice a year, in December and June. Member groups of India-CMS collaboration should submit their requests at least a month before the meeting. Faculty members should provide a plan for visits to CERN more than two months prior to the visit for themselves and their students. It is advisable that a student is properly supervised while stationed at CERN either by his/her advisors, co-advisors or a senior collaborator with whom the student is working. Therefore, a work plan should be carefully thought out and submitted when seeking approval for a visit. The Spokesperson should get the visits sanctioned well in advance (November and May).

The actual period (less than or equal to the period sanctioned by the task force) of the visit should be left to the discretion of the individual groups depending upon the need and resources available.

A regular visit to CERN can be extended if there is an urgent reason based on the nature of the work the member is involved in, e.g. detector related emergency, critical stage in a physics analysis or an unforeseen meeting. If any visit has to be extended, approval will be sought by email to the Spokesperson and the deputy Spokesperson mentioning appropriate reasons. They will get the task force approval and make sure that approval is granted within 3-5 days.

For the purpose of visits to CERN, January – June and July – December blocks should not be treated as disjoint sets. Once the approvals are given, there should be some flexibility in joining the periods.

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Fund Allocation: India-CMS collaboration is an umbrella project funded jointly by DAE and DST, India. The funding requirement is to be submitted for each five-year plan to these agencies with the consolidated requirements from all the collaborating organizations. The funds will then be allocated to the individual organizations depending on the extent of their participation in the (i) hardware development and contributions to the CMS experiment, (ii) faculty and student strength and (iii) evaluation of the performance during the previous plan period.

Procedures for Ratification and Amendments Any change in the constitution adopted shall be ratified by a two-third vote of all faculty members who are part of the India-CMS collaboration. Subsequent amendments may become necessary as the experiment and need of the collaboration evolve. Amendments can be proposed by any three members of the India-CMS collaboration to the Spokesperson who will circulate it for discussion and voting will take place in the following India-CMS collaboration meeting. The India-CMS Spokesperson shall inform the Indian funding agencies, DAE and DST, of changes to the India-CMS Constitution as necessary. Any decision made by a majority of the voting members of India-CMS will over ride any decision taken by the Spokesperson/ Deputy Spokesperson.

Annexure - I Full members: 1. Bhabha Atomic Research Center (BARC), Mumbai 2. University of Delhi, Delhi 3. Panjab University, Chandigarh 4. EHEP Group, Tata Institute of Fundamental Research (TIFR), Mumbai 5. HECR Group, Tata Institute of Fundamental Research (TIFR), Mumbai 6. Saha Institute of Nuclear Physics (SINP), Kolkatta 7. The School of Physical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 8. Indian Institute of Science Education and Research (IISER), Pune 9. Indian Institute of Technology (IITM) Madras, Chennai

Associate member with the EHEP Group of TIFR 10. Visva Bharati (VB), Santiniketan

Associate member with NISER, Bhubaneswar 11. IIT Bhubaneswar (IITBh), Bhubaneswar

Associate member with BARC 12. IIT Bombay (IITB), Mumbai

Participants from these institutions are the faculty, research staff and students, who carry out the tasks detailed above.

Annexure - II

Guidelines for New Groups to Join India-CMS Collaboration It is the endeavour of India-CMS to promote groups in India to join the adventure of experimental high energy physics through working in the CMS collaboration. Within India, the CMS related activity is organized through the India-CMS collaboration which at present comprises the following groups: BARC, Mumbai, University of Delhi,

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Delhi, Panjab University, Chandigarh, TIFR-EHEP and TIFR-HECR groups at Mumbai, Saha Institute of Nuclear Physics, Kolkata, NISER, Bhubaneswar, the Visva Bharati, Santiniketan and IIT, Mumbai. The funding is provided jointly by DAE and DST. The major decisions within the collaboration are taken after discussion in the general meetings of the collaboration and endorsement by the Faculty. India-CMS collaboration holds quarterly meetings at one of the above institutions by rotation. To formulate guidelines for new groups to join India-CMS collaboration, five member committee (Prof. J.B. Singh, Prof. S. Dugad, Prof. A. K. Mohanty, Dr. G. Majumder, Dr. S. Bhattacharya) was formed during the Sept. 27-28, 2007 India-CMS Meeting at New Delhi. After deliberation on the matter committee has come up with the following recommendations to be approved by the faculty.

Section A:

Guideline for Evaluating the Proposal from a New Group The committee recommends applying the following general guidelines for the New Institutes, submitting proposal to the India-CMS collaboration, to be admitted to India-CMS and decide accordingly. 1. Institute/University interested to join India-CMS collaboration should be well established with good standing in the area of high energy and/or nuclear physics. However if the Institute/University does not already have established experimental high energy and/or nuclear physics group, participating members of the group willing to join India-CMS collaboration should have good standing in the area of experimental high energy physics and/or experimental nuclear physics. 2. Institute/University should have a program (teaching and/or research) for M. Sc. in Physics and/or higher level courses in Physics so that they will be able to attract research scholars to work on the CMS experiment for their Ph. D. degree. Also, Institute/University should be authorized to admit and supervise the research scholars in their work towards the PhD degree, or else should allow their students to get registered with one of the existing India-CMS Institute/University to get their PhD degree. 3. Regarding joining India-CMS collaboration, the head of Institution (Director, Chairperson, Vice-Chancellor, etc) should assure the normal institutional support such as space, deputation leave, etc. An official letter from the respective institution authorities should be obtained in this regard. In order to make effective participation, it should be understood by the sanctioning authority of institute/university that the staff members would be expected to spend about 2-3 months/year away from their respective institution and spend a significant fraction of their time for the CMS experiment throughout the year, and also develop computing facilities specific to the CMS experimental activity at their home institution. 4. Any new group that wishes to join India-CMS Collaboration should constitute of at least two faculty members. If it is only single person group, then that person can work through any of the existing group. There should be a potential for the person to form minimum 2-3 members group in the near future (2-3 years) for their contribution in CMS to be more viable. Until then this group would be recognized as Associate Member of the existing India-CMS group (as per CMS Constitution). 5. Members of the new Institute should have a background in experimental high energy physics /nuclear physics and should have shown proven expertise in at least one of the areas such as hardware and/or software and physics analysis. This potential can be judged from their past experience in experimental high energy physics/nuclear physics. Members should have at least 3 years of post-doctoral experience in the experimental high energy physics/ nuclear physics. 6. Members should mention explicitly about the area of interest in the CMS experiment including hardware, software and physics analysis. While the primary hardware fabrication responsibility of India-CMS is practically complete, Institute should be in a position to take up the hardware upgrade job or contribute in the form of CMS service tasks like: software development for detector monitoring, operation, in-situ

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testing and calibration of detector, operation and maintenance of the CMS Tier-2/3 grid computing system etc. 7. Members should explicitly mention other major research projects undertaken by them and specify how much time each member can devote for the CMS experiment. Members should not be involved in more than 2 Major Experiments. 8. Resources that would be brought to the India-CMS collaboration should be spelled out: a) Human resources, in terms of FTE’s (full time equivalent) faculty or post-doc members who would be committed to CMS work. b) Participant groups are expected to work at existing India-CMS Institutes/Universities and subsequently at CERN. How much time members can be available from their teaching schedule to be deputed to other CMS Institutes within India and later on at CMS site? c) The hardware/software Lab. Facilities/ space available within the Institute. 9. In order to make sure that new groups can contribute effectively towards the India-CMS effort, they should be encouraged to contact existing groups and pursue India-CMS activities that are of mutual interest to them. This will enable them to enter CMS activities and also allow a better assessment about their capabilities of contribution to be made in the CMS experiment. This period should be about one year. During this period, the present India-CMS group would pay their travel and stay expenses for a reasonable length of stay at their institution (say 2-3 months). 10. Theoretical physicists or groups should not be admitted as an independent institute. However individual theorists can be admitted as member of the existing India-CMS group, if she/he has reasonable expertise in the Collider Physics phenomenology and agrees to take up CMS related service task mentioned in Clause 6.

Section B:

Procedure for Inducting New Groups The committee proposes the following procedure for induction of new groups in the India-CMS collaboration:  New groups desirous of joining India-CMS collaboration would be expected to make an open presentation of the proposal in India-CMS collaboration meetings, expressing their previous experience and possible activities of interest in CMS experiment and submit a proposal including CV of each investigator.  Once the institute/university/group satisfy the above guidelines (Section A), it is to be approved in the faculty meeting of the India-CMS collaboration. Then the steps mentioned below may be followed for the admission:

 The group should adopt the procedure mentioned in Clause 9 and after one year, progress should be reported to India-CMS for the evaluation of membership.  After successful evaluation of the progress, the India-CMS collaboration will approve their membership and the India-CMS Spokesperson subsequently will write to the DAE and DST and ask for proper allocation of funds to the New Institute.  The India-CMS spokes person will also take up the matter with the CMS management at CERN. The general course for small groups joining is to admit them as Associate Members to one of the existing India-CMS groups and, after a few years of satisfactory contribution, they could be considered for full membership of CMS as per the guidelines of CMS collaboration.  A group with two members or less should be Associate Member of existing India-CMS group having more than two members.

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Task Force Approval of the Constitution: 26th May, 2014, TIFR

Guidelines for Evaluating the Proposal from a New Group

Section A: The committee recommends applying the following general guidelines for the New Institutes, submitting proposal to the India-CMS collaboration, to be admitted to India-CMS and decide accordingly.

1. Institute/University interested to join India-CMS collaboration should be well established with good standing in the area of high energy and/or nuclear physics. However if the Institute/University does not already have established experimental high energy and/or nuclear physics group, participating members of the group willing to join India-CMS collaboration should have good standing in the area of experimental high energy physics and/or experimental nuclear physics. 2. Institute/University should have a program (teaching and/or research) for M. Sc. in Physics and/or higher level courses in Physics so that they will be able to attract research scholars to work on the CMS experiment for their Ph. D. degree. Also, Institute/University should be authorized to admit and supervise the research scholars in their work towards the PhD degree, or else should allow their students to get registered with one of the existing India-CMS Institute/University to get their Ph.D. degree. 3. Regarding joining India-CMS collaboration, the head of Institution (Director, Chairperson, Vice-Chancellor, etc) should assure the normal institutional support such as space, deputation leave, etc. An official letter from the respective institution authorities should be obtained in this regard. In order to make effective participation, it should be understood by the sanctioning authority of institute/university that the staff members would be expected to spend about 2-3 months/year away from their respective institution and spend a significant fraction of their time for the CMS experiment throughout the year, and also develop computing facilities specific to the CMS experimental activity at their home institution. 4. Any new group that wishes to join India-CMS Collaboration should constitute of at least two faculty members who are beyond their probation stage. If it is only single person group, then that person can work through any of the existing group. There should be a potential for the person to form minimum 2-3 members group in the near future (2-3 years) for their contribution in CMS to be more viable. Until then this group would be recognized as Associate Member of the existing India-CMS group (as per CMS Constitution). 5. Members of the new Institute should have a background in experimental high energy physics /nuclear physics and should have shown proven expertise in at least one of the areas such as hardware and/or software and physics analysis. This potential can be judged from their past experience in experimental high energy physics/nuclear physics. In general, members should have 3 years of post-doctoral experience in the experimental high energy physics/ nuclear physics. In exceptional case, this condition can be waived by India- CMS followed by Task Force. 6. Members should mention explicitly about the area of interest in the CMS experiment including hardware, software and physics analysis. While the primary hardware fabrication responsibility of India-CMS is practically complete, the new Institute should be in a position to take up the hardware upgrade job or contribute in the form of CMS service tasks like: software development for detector monitoring, operation, in-situ testing and calibration of detector, operation and maintenance of the CMS Tier-2/3 grid computing system etc. 7. Members should explicitly mention other major research projects undertaken by them and specify how much time each member can devote for the CMS experiment. Members should not be involved in more than 2 major ongoing experiments. 8. Resources that would be brought to the India-CMS collaboration should be spelled out: a. Human resources, in terms of FTE’s (full time equivalent) faculty or post-doc members who would be committed to CMS work.

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b. Participant groups are expected to work at existing India-CMS Institutes/Universities and subsequently at CERN. How much time members can be available from their teaching schedule to be deputed to other CMS Institutes within India and later on at CMS site? c. The hardware/software Lab. Facilities/ space available within the Institute. 9. Theoretical physicists or groups should not be admitted as an independent institute. However individual theorists can be admitted as member of the existing India-CMS group, if she/he has reasonable expertise in the Collider Physics phenomenology and agrees to take up CMS related service task mentioned in Clause 6.

Section B:

Procedure for Inducting New Groups The committee proposes the following procedure for induction of new groups in the India-CMS collaboration:

(a) New groups desirous of joining India-CMS collaboration would be expected to make an open presentation of the proposal in India-CMS collaboration meetings, expressing their previous experience and possible activities of interest in CMS experiment and submit a proposal including CV of each investigator. (b) Once the institute/university/group satisfy the above guidelines (Section A), it is to be approved in the faculty meeting of the India-CMS collaboration. Then the steps mentioned below may be followed for the admission. (c) The India-CMS spokesperson will take up the matter with the CMS management at CERN. The general course for small groups joining is to admit them as Associate Members to one of the existing India-CMS groups and, after a few years of satisfactory contribution, they could be considered for full membership of CMS as per the guidelines of CMS collaboration.

Regarding Budget 1. After recommendation of India-CMS for new group joining CMS, India-CMS spokesperson will inform the Task Force and request for approval so that new group can ask for funding. 2. The funding request of a new group (both independent and associate) to DAE+DST should be forwarded through India-CMS. It is mandatory for new group to keep provision in the budget for M&O component (in proportion to the faculty strength if they join during the middle of a five year plan period) which will be part of the India-CMS common fund. In case of independent group, there should also be budget request for one time entry fee to be paid to CMS at CERN. 3. It is the responsibility of the new group joining as independent India-CMS member to arrange one time entry fee as of when due either from the funding agency or from their own institute before registering at CERN. 4. While the independent institute will register at CERN as new India-CMS institute, the associate member will be listed under the host institute at CERN. This is only to facilitate the associate member to work at CERN and also at host institute if host institute agrees. However, there is no financial obligation of host institute for associate member. The associate member has to arrange his/her own funding as mentioned above. 5. It is necessary for new groups to get their own funding including M&O as mentioned above when new group joins during middle of a plan period. However, if there is delay in funding, India-CMS may consider paying their M&O after obtaining Task Force and DAE approval.

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India-CMS Logo Competition

During the last couple of years it was strongly felt by the groups fabricating hardware for CMS experiment that India-CMS should have a logo, which can be put on the hardware items/pieces, as is the practice with most of the institutions from other countries.

At the last India-CMS meeting, held at Panjab University, Chandigarh during 20-21 March, 2015, this idea was proposed and was well received. Following this a logo competition was held in which the India-CMS members were asked to send the logos designed by them. A total of 16 logos were received. These were evaluated by all faculty members in a confidential mode.

The logo designed by Mr. Varun Sharma, Department of Physics & Astrophysics, University of Delhi was finally selected.

Compact Muon Solenoid (CMS) Achievement Award

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Fabrication, Testing and Installation of CMS Detector Components by Indian Groups

I. HO Electronics Contributed by Shashi Duggad (TIFR)

The HO detector was fabricated by two Indian groups, PU and TIFR. The response of photo readout elements and HO detector to LED light source, muons and pions at varying energy was extensively studied at the H2 test-beam facility of CERN. Indian groups carried quality control of HO detector, readout electronics, burn-in tests, installation and commissioning of the HO detector. This was quite voluminous and challenging activity involving large number of people from TIFR and PU. Entire responsibility of HO fabrication, quality control, commissioning took about 10 years and was completed in 2008.

The hybrid photo diode (HPD) was state of the art device when decision about photo readout element for HCAL was taken around 1998. Performance of this device was certified by carrying extensive Figure 1. Mounting board containing 18 SiPM tests under high magnetic field (4 Tesla) and high radiation dose. However, when the cosmic data was taken during commissioning of CMS magnet, discharging tendencies of HPD were observed only for the HPD’s in the HO detector. Detailed tests carried out to investigate this phenomenon showed that HPD’s perform well at 4 Tesla (HPDs in HB experiences this field)), however they show instability when subjected to lower magnetic field (0.1-1.0 Tesla). The discharging tendency of HPD’s in the HO detector which experiences similar field, not only seriously compromises the life time of the device but also mimics the fake signal of almost 50 GeV energy loss in the HO detector.

In view of this, CMS management in consultation with Indian groups decided not to operate HPD’s in outer rings. HO detector in YB0 was operated at lower voltage. Due to these problems that were identified in 2008-2009, the HO detector could not be operated with its full potential. It was quite clear that we need to replace the HPD’s with some other device to overcome this serious problem. Around this period, significant development had taken place in fabrication of Silicon Photo Multiplier (SiPM). It has large gain, compact size and excellent photon detection efficiency. Several tests carried out for dark count and photo response in presence of magnetic field varying between 0-4 Tesla indicated feasibility of this device as a substitute for HPD. Following this, several tests were carried out to study the response of HO Figure 2. Control board providing with SiPM as photo readout element for muons and pions. Excellent programmable bias voltage to 18 SiPM, Signal/Background ratio was observed for muons with SiPM (about 5 voltage to Peltier cooler etc. times higher than that of HPD). Test-beam activities at CERN were coordinated by DESY, FNAL and TIFR. Panjab University and TIFR took major responsibility of analyzing test-beam data for HO.

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After carrying out these extensive studies CMS management decided to replace HPDs in all 5 rings with SiPM in 2009. Responsibility of designing, fabrication and quality assurance of control boards, bias voltage board and mounting boards was jointly undertaken by Fermilab and TIFR with funding from DESY, FNAL and TIFR. 160 control boards and bias voltage boards were fabricated indigenously by TIFR. Figure 1 and 2 show the control board and mounting board consisting of 18 SiPM.

Several students from Panjab University and TIFR participated in carrying out burn-in tests at CERN, developing analysis framework and analysis of the burn-in data. The last phase of installation of HO was completed by July 2014.

Fabrication of Si boards and installation

The Compact Muon Solenoid (CMS) detector has unique capabilities for the jet physics stemming from a full silicon tracking system projected on a high precision electromagnetic calorimeter. The role of hadron calorimeter is not only to serve as a full absorption energy measurement calorimeter but is more heavily devoted towards particle identification and isolation methods. The Barrel Hadron calorimeter (HB) is complemented with a Outer Hadron Calorimeter (HO). Outer Hadron Calorimeter is just outside the solenoid and inside the magnetic flux return yoke. It provides an additional calorimeter coverage of about 3 λ thickness and ensures containment of highly energetic hadron showers and thus works as a tail-catcher to improve the energy measurement of jets and missing transverse energy. It used Hybrid Photo-diodes (HPD's) as a photo-detector during Run I of Large Hadron Collider (LHC). However, due to the degraded performance of these HPD's, they were replaced by the next generation photo-readout, Silicon Photo-Multiplier (SiPMs) during the long shutdown I (LSI).

The integration of SiPMs in the detector on such a large scale was done for the first time, so different aspects needed for the successful running in Run II were studied. The functionality of SiPMs as a photo-readout element should be established. To optimize the performance of SiPM in HO detector, studies have been carried out on various aspects of characterization. Due to the different aperture size of the photo-detector, a coupling light guide usually called light mixer is desired. Performance studies of different light mixers during various test beams were carried out at CERN. SiPMs are not linear devices and their QIE saturates. So a study has also been made for the choice of dynamic range and gain at which these SiPMs should operate during Run II. For the certification of the SiPMs, different analyses were performed such as stability, pedestal, peltier, noise, self trigger. One of the main issues with Hamamatsu SiPMs is to regulate its temperature with variation of only 0.1oC as SiPMs gain depends linearly on the temperature with the relative dependence of 8% gain shift per oC at a foreseen operating over- voltage of 1.5 V. The response of SiPM was studied for the stability through the fluctuations or variation in temperature, current, pedestal with time. Breakdown voltage is a key parameter of a device as it limits the operation under reverse bias. The variation of breakdown voltage of SiPMs with time was studied and the SiPMs are found to be stable within 50mV. The relative variation in gain for PED runs with time was also studied. The relative variation of gain for all channels and RMs is within 3% of the peak value. The good SiPMs, certified through quality control and burn-in measurements, were installed in the CMS detector during LS1 shutdown and the commissioning runs for the calibration and detection efficiency of HO have also been studied. The upgraded HO with SiPMs will not only help in improvement of the hadronic energy measurements but can also allow the CMS muon system to use HO data for a combined muon trigger. After the successful results of SiPMs in HO, the other sub-detector like HB, HE and HF are also planned to include the SiPMs as photo-sensors in LS II shutdown.

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II. Hadron Calorimeter (HCAL) Upgrade Contributed by Manoj Sharan (SINP)

The electronics of HCAL detector is being upgraded during the long shutdown 1 (LS1). With the installation of SiPM devices for the barrel, endcap and outer segments of the detector and a new photo-multiplier for the forward detectors (HF), number of channels to be read out will increase. In addition, the electronics is now more than 2 decades old and to take advantage of latest technology (like micro TCA based systems used in telecom industry for 3G and 4G) is being adapted for use in this upgrade.

India has taken major responsibilities in development of these Figure 3. Micro TCA read out card technologies, testing and installation of these devices. The expertise of industries, who have been active players in rolling out of 3G and 4G technologies for telecom industry, was leveraged to develop, fabricate, do quality control and install these units. Indian groups (University of Delhi, Panjab University, Visva Bharati and SINP) have made substantial contributions in two broad areas: 1) micro TCA based read out cards for HF and 2) Optical Splitters for barrel and end-cap HB/HE detectors.

Micro TCA read out cards (uHTR cards): In collaboration with University of Minnesota, a prototype card was developed in Bangalore based companies. These were then tested in beam and after 4 revisions; the final production cards were made. This is a 14 layer PCB board using the 2 FGPGA devices. This needs 5 power modules which were fabricated separately and requires separate burning and testing for 39 hours each. Around 200 numbers of such modules were separately tested at Delhi, Panjab, Visva Bharati and SINP. 60 uHTR cards have been fabricated and installed at CERN in end of 2014. Currently commissioning of these cards is going on and Indian students have played a major role in testing, commissioning of these cards. Some of the expertise which the Bangalore based company Micro-pack Limited developed was use of NELCO material for high speed signal transmission and Gerber rotation for signal integrity. Figure 4. The Optical splitter (above left) will split the signals between the existing VME based system and uTCA based system Optical Splitters for HB/HE Upgrade: With the (above right) which has been made by Indian groups. commissioning of new micro-TCA based electronics for data taking (back-end), it is planned that the old electronics (VME) is also retained for some time (at least one year) to check the performance and trigger calculations. For doing this, signals from front-end need to be split. No standard solution existed and with a Mumbai based company (PDR Videotronics), a prototype was designed and developed by the Indian groups. These units had to be efficient (signal loss less than 4 db) and yet very compact to fit in the small space. The prototypes worked very well and the HCAL operational groups ordered 6 more of these units and their performance was very good and consistent. 206 such units have been shipped and installed at CERN.

Optical splitters for LS1 upgrade were crucial for the working of trigger with CMS HCAL back-end electronics. Students and post-doc have played a major role in designing and testing for the last 3 years, to meet our partial commitment towards LS1 upgrade (Figure 5).

Plans: Indian groups have worked together successfully with the industry to fabricate and commission these items for HCAL upgrade. The groups are planning to take the responsibility for the development and deployment of control cards

22 for Silicon photo-multiplier tubes to be installed for HCAL end-cap detectors. These cards have to meet the projected radiation damage criteria and the initial goal is to make some prototypes and check them in test beam studies.

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Figure 5. Indian students working for the installation of optical splitters. Also, this is the first unit bearing the India CMS logo along with the logos of participating institutes. The whole exercise was funded by University of Delhi, Panjab University, & Visva Bharti for the 210 optical splitters. III. Resistive Plate Chambers (RPCs) Contributed by L. M. Pant (BARC) & J. B. Singh (PU)

Resistive Plate Chambers installed for the fourth layer of the Compact Muon Solenoid muon system at the LHC facility at CERN

The CMS muon system consists of three different sub-detectors: RPCs (Resistive Plate Chambers), DT (Drift Tubes) and CSC (Cathode Strip Chambers). The end-cap region is made of CSCs and RPCs in the first three disks and RPCs are installed in the fourth disk as part of the RE4 project (Resistive Plate Chambers for the Fourth End-Cap). The fourth station (called RE4) is added to the CMS end-cap muon system during the LHC Long Shutdown (LS1 – 2013-2014). The construction of the RE4 is an international project carried out by teams from institutes in Belgium, Bulgaria, China, Colombia, Finland, Georgia, India, Italy, Korea, Mexico and Pakistan as well as from CERN. CERN plays an important role in the chamber construction and testing at the RPC laboratory located in building 904 at Prevessin, where many physicists, engineers, technicians and students from around the world Figure 6. The RE4 Chamber assembly and commissioning team at NPD-BARC. worked together, along with the assembly sites in Belgium (University of Ghent) and India (NPD-BARC, Figure 6 and Panjab University, Figure 7).

The RE4 layer on both sides of end-caps is instrumented with a total of of 72 super-modules, each of which is made by two double-gap RPCs (Figure 8). A total of 200 RPCs (144 RPCs for installation and 56 RPCs as spares) were required for the entire project. The super-modules were needed to be built and installed inside CMS detector within a period of 24 months. A number of institutions involved with the RPCs covered all the tasks and worked very hard in order to complete this project by the end of 2014. These tasks were distributed among the following countries: Korea was responsible for the construction of 660 gas gaps and 10 chambers. Pakistan, Italy and Finland worked on the front-end electronics, DAQ and power system, while India (NPD-BARC and Panjab University) built and characterized 50 RPCs, apart from producing and testing 200 Cu cooling sets (MD & PDD-BARC) for the entire collaboration. Bulgaria, Mexico and Georgia were responsible for super-module assembly and testing. India, Italy and Pakistan were building the chamber services (gas, cooling and cabling). China provides the readout strips, mechanical frame boxes and participated in the chamber construction and testing at CERN.

A large international team worked for the installation and commissioning of the full system. All the chambers were assembled and tested at three different assembly sites: CERN, Ghent (Belgium) and India (BARC-Mumbai and Panjab University). The students and technicians from Panjab University, Chandigarh also worked at NPD-BARC for the assembly and characterization (Figure 9). The last set of RPCs was assembled and characterised at Panjab University, Chandigarh, prior to their dispatch to CERN in April 2014. Students from Mumbai University have also contributed for the project (Figure 11). At the assembly sites, quality control was performed on all chamber

24 components, which were then assembled in to the chambers with an average assembly rate of one chamber per day. After the construction, each chamber was tested in a cosmic stand for about a week in order to study the chamber performance. After a successful cosmic test, high voltage was applied to each chamber to power-on and to monitor for about three weeks in order to check its stability over time. Afterwards, a pair of chambers was assembled into a super-module. It was then sent to the CMS experimental site for installation. One of the end-caps

Figure 7. The RE4 Chamber assembly and commissioning team at Panjab University, Chandigarh. with 72 RPC detectors (36 super-modules) was installed in December 2013 (Figure 10) and the other one was installed in May, 2014.

Figure 8. The Super Module Assembly. The Cu cooling sets were built at MD&PDD-BARC

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Figure 9. Students and technicians from PU, also collaborated in the assembly and characterization of RPCs at BARC.

Figure 10. Students from Mumbai University (M. Sc. Physics), as Figure 11. The positive side of the RE4 (End Cap +) part of their project, involved with the Visual Inspection of the installed 100 metres below the ground, at Point 5 in Gas-Gaps on their arrival from KODEL at BARC Cessy, France is approximately 15 metres in diameter, weighing close to 5 tons.

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IV. Future Hardware Activities

The GEM upgrade for the high eta region for the Long Shut Down -2 (2017-2020) Contributed by L. M. Pant (BARC) & Supratik Mukhopadhyay

1.6) of the CMS muon stations. These detectors shall be employed both for the tracking and triggering simultaneously and would use

Argon and CO2 gas mixtures which are non-inflammable. The high granularity compounded with the high count rate capability make these detectors as forerunners to be employed in the extreme forward region of the CMS detector, when it goes to an order of higher Luminosity after the Long Shut Down-2 Figure 12. Single GEM with voltage divider, gas flow in RPC Lab., NPD and the 5.9 x-ray peak (2017-2020). The heart of from 55 Fe

Indian institutes (Delhi University, NISER- Bhubaneswar Panjab University-Chandigarh and SINP- Kolkata) have expressed their interests to help build up a part of the muon forward region with GEMs. The institutes have shown their interests in:

1. Hardware development 2. Simulations and reconstruction

Figure 12 shows the initial test results of a 10 cm x 10 cm single GEM foil procured from CERN at NPD-BARC with x-rays from 55Fe and the responses with HV variation for a similar set up (a triple GEM) at SINP- Figure 13. Large area and segmented GEM foils required for the Kolkata. high eta upgrade of CMS

BARC emphasised the role of development of GEM foils in India and had approached the following industries last year, explaining them the potential applications of GEM technology in the field of high energy physics, medical imaging and homeland security.

1. Kerthi Industries Electronics Division-KIED, Hyderabad

2. Micropack, Bangalore &

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3. Alpha Pneumatics, Mumbai

The above industries have since then visited CERN/are planning to visit in 2015. CERN had been quite instrumental in facilitating the free transfer of patented technology to M/s KIED and M/s Micropack, who have already visited CERN last year to get acquainted with the recipes, tools and techniques for rolling the GEM foils in India. Figure 13 show

Optimization studies of triple-GEM device for its application in the upgraded muon system of CMS experiment are undertaken at Saha Institute of Nuclear Physics (SINP). These include the detailed simulation and measurement of the device characteristics such as electronic gain, transparency, time and spatial resolution. A systematic investigation of the gain and transparency with Ar+CO2 mixture has been completed. The next phase of work will be started after procurement of Ar+CO2+CF4 mixture. A sophisticated multichannel high voltage supply SY4527 has been installed to provide voltages to each GEM stages individually replacing a distribution circuit used earlier. This would be useful to optimize the device response with fine tuning of the field configuration.

Single Mask GEM foil development in India:

There are various techniques available around the globe for making punch through holes for Micro Pattern Gas Detectors (MPGDs), such as Gas Electron Multipliers

(PMMA/kapton) (5/50/5). At present these foils are developed in South Korea without having any adhesive between the Cu and polyimide. The available techniques range from chemical etching, reactive plasma etching and laser etching. However, for GEM detectors, having an active area upto 5000 2 cm , the chemical etching process using a Figure 14. Process stabilization of 100 µm size hole, with a pitch of 200 Single Mask has been developed at CERN µm, through chemical etching which is faster from the viewpoint of mass production of such foils for the upgrades which are foreseen in a couple of years with the Large Hadron Collider facility at CERN.

BARC (NPD), a member to RD51 collaboration too, had been instrumental in free transfer of patented technology from CERN for the development of Single Mask GEM foils with Indian industries. Both the dry etching and wet etching processes are being explored with different industries. After about a dozen of iterations, the wet etching at M/s Micropack at Bangalore and BARC (NPD) will continue with its efforts in this direction in developing large sized foils. As an alternative technique reactive ion etching (dry etching), process is also being developed parallely using Sulphur Hexafluoride + Oxygen plasma (SF6 + O2 plasma) for developing small sized foils on a faster scale.

An intense x-ray source (Au target) with associated shielding for absorbing x-ray fluorescence and safety features is also operational at BARC (NPD) which can fully illuminate a GE1/1 and similar sized detectors (Figure 15). Civil work is in progress to develop a class 100 (hundred) volume (8 m x 5 m x 3 m) enclosed inside a class 1000 (thousand),

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for handling indigenously developed foils and translating them into a triple GEM amplifier and characterizing them. Adequate gases, gas mixers and mass flow controllers, which are GEM specific, along with VME based DAQ with 1k of TDC channels already exists in the lab. A GE1/1

3/1/2/1 mm gap spaci channels) is expected to arrive at BARC (NPD) very soon.

Figure 15. Remote controlled x,y,z positioner of the intense x-ray source inside lead shielding for illuminating GE1/1 and similar sized detectors at BARC (NPD)

Figure 16. The GE1/1 detector with 8 η segments, 3/1/2/1 mm gap spacing and ~ 4k readout channels

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India-CMS in CMS Phase II Tracker Upgrade Contributed by Gagan Mohanty (TIFR)

After first long shutdown (LS1), covering the last two years, the experiments at the large hadron collider (LHC) are back in action since June and recording proton‐proton collision data at a higher center-of-mass energy of 13 TeV. Future planning for the LHC and injector chain foresees two such long shutdowns: LS2 and LS3. In the period through LS2 (2019), the injector chain will be improved to deliver very bright bunches into the LHC, and the instantaneous luminosity will go up to twice the design value. During LS3 (2023‐2024), the LHC itself will be upgraded with new low-β triplets and crab cavities to optimize the bunch overlap at the interaction region achieving a record-breaking luminosity mark of 1035 cm-2s-1. The data-taking period after LS3 or Phase-II is also called the high-luminosity phase of the LHC (HL-LHC).

The present tracking system of the CMS experiment needs to be replaced with new detectors to improve or at least maintain the physics performance in the monstrous pileup conditions of the HL‐LHC. Especially, the detectors in the outer tracker as well as pixel detectors would be unable to cope with even the first few years during that operation. The current tracker was designed to operate without any loss in efficiency up to an integrated luminosity of 500 fb−1 and an average pileup of less than 50 per bunch crossing. In addition to these design limitations, there will be further constraints from the data acquisition (DAQ) and trigger systems that need significant upgrades to cope with the interaction rate and latency to take a Level-1 (L1) decision. The main requirements for the tracker upgrade are:

a) radiation tolerance b) increased granularity c) improved two-track separation d) reduced material budget e) robust pattern recognition f) compliance with the L1 trigger upgrade g) extended acceptance. This provides a unique opportunity for the India-CMS Collaboration to participate and significantly contribute towards building of the upgraded tracker for Phase II. Five participating India-CMS groups viz. TIFR (Mumbai), SINP (Kolkata), DU (Delhi), IITM (Chennai) and NISER (Bhubaneswar) have come together to form the so-called “India- CMS Tracker Consortium”. The consortium is involved in several R&D activities ranging from sensors, mechanics, module design and construction, DAQ, and system tests. Various ongoing and planned activities along with the involved groups are given below.

Silicon sensor R&D (DU, TIFR): The DU and TIFR groups plan to collaborate with the Bharat Electronics Limited (BEL) in Bengaluru. DU is contributing to the silicon strip sensor design for the Phase II Tracker by complementing the measurements done at various institutes with the device simulation. The results are much appreciated within the CMS Phase II Tracker sensor working group. They are part of the CMS silicon sensor simulation group, and would continue to participate in optimizing the design of n-in‐p strip sensors and in their radiation damage modeling. The work done by DU is included in the recently released “Technical proposal” for the phase-II upgrade. In the past, the DU group had collaborated with BEL and BARC on successful development and characterization of millistrip silicon sensors for the CMS preshower detector. Recently, the group has been involved in the design of single-sided AC coupled microstrip sensors on 4” wafers at BEL. Some of these fabricated sensors have been characterized in Karlsruhe and results are found to be satisfactory. The feedback obtained will be useful for the future strip sensor processing at BEL. The TIFR group has been successful, for the first time in India, in producing 4” single‐sided AC coupled microstrip sensors [JINST 9 (2014) P06008]. Initially, they developed a prototype sensor of

30 different width and pitch combinations on a 4” wafer. After finding suitable test procedures for characterizing these AC coupled sensors, they fine-tuned various process parameters in order to produce sensors of the desired specifications. Now the group wishes to take the existing collaboration with BEL a step ahead towards R&D with 6” sensors. Given their shared interest, the TIFR and DU groups would like to collaborate in this activity. The CMS Tracker sensor working group is willing to help the Indian institutes and industries for the sensor R&D in all possible manners. A successful collaboration in this area will provide a big boost to the Indian silicon industry.

Sensor test and qualification (DU, NISER): The DU group is equipped with basic sensor characterization setup that needs major improvement in order to be qualified as a CMS sensor qualification center (SQC). The group is planning to expand its capabilities to multi‐strip measurements, which need many additional systems to be procured and developed. With a team of dedicated students and project fellows, they have the required experience and expertise to develop such a setup. The DU group is aiming to be an SQC for the Phase II CMS Tracker Si strip sensors. The NISER group, relatively new to the game, plans to set up a dedicated clean room facility with the sensor characterization setup and would be able to assist DU in this area of activities.

Module production and qualification (TIFR, SINP, IITM): The TIFR group strongly desires to set up a module assembly and test center in Mumbai. They have much of the necessary equipment such as an automatic Delvotec wire‐bonder, high-resolution inspection microscopes and 3D coordinate measuring machine. They also have plans to procure a glue‐dispensing robot, cold chuck etc. The TIFR workshop has requisite skill to fabricate various precision assembly jigs under a careful supervision of their engineering and technical team. They have acquired a good deal of expertise on such high‐precision mechanics during their participation in the silicon vertex detector assembly for the Belle II experiment. The group is already collaborating with the teams at CERN and DESY on the design of the module frame and support structures, especially for the 2S modules of the outer barrel tracker. They plan to set up necessary infrastructure for carrying out mechanical and thermal measurements in Mumbai. In collaboration with the local industries, they are also exploring the fabrication of Al-CF bridges and spacers. Preliminary exercise has been largely successful and they are working on further optimization. In addition to module mechanics, the TIFR team is working on the assembly of mechanical prototype of the tracker module. This important exercise will establish their engineering and technical capabilities for being a module assembly center. The SINP group wishes to complement TIFR’s effort by setting up a DAQ setup to test the modules. They are already a part of the Tracker DAQ group and have been contributing in some aspects like test‐beam analysis and monitoring software etc. They are developing the digitizer for the Phase II Tracker. An in-house test setup will be an important tool to tune the parameters. The objective here will be to work in tandem to get ready for the module qualification while TIFR concentrates on the module integration aspects. Once experienced enough the setup will be replicated at TIFR. If the plan goes well, there will be two test centers to qualify tracker modules. The IITM group, another new entrant, is exploring the possibility of carrying out a part of the module assembly activities in Chennai.

Development of track trigger (NISER, SINP, TIFR): NISER, SINP and TIFR groups are interested to participate in the development of the L1 tracking and track trigger. A member of the TIFR group has some experience in FPGA programming. The SINP group is already working on the simulation of AM based tracking at L1. The SINP and TIFR groups have experience of an effective collaboration with the Indian Electronics industry where micro-HTR cards with power and control mezzanines for the CMS Hadron Calorimeter were fabricated successfully. We would like to set up a test stand for the development and testing purpose and to explore the possibility of production of electronic components in the Indian industries. We are interested in contributing to the development of track fitting algorithm to be implemented on the FPGAs of the backend electronics boards.

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Tier2 Center of India for the CMS Experiment

The Tier2 (T2) center of India for CMS experiment, named T2-IN-TIFR, is located at TIFR, Mumbai (Figure 17). It is a national contribution to CMS computing as well as a national facility for the scientists in the country participating in the experiment. It is functional since 2008 on 24X7 basis and has an average reliability and availability of about 95%.

According to the LHC grid computing model at the inception, the world-wide LHC computing grid is based on the hierarchical structure with CERN as the CMS Tier0 connecting to 7 Tier1 sites which, in turn, connects to about 45 T2 sites. The backbone of the distributed Grid computing is wide area networking with high speed. With rapid increase in available bandwidth and increased traffic among T2s, the structure has changed from hierarchical to planar in recent years.

T2 centres are used for both Monte Carlo event generation, as well as for storage of simulated and Figure 17. The Tier 2 Center at TIFR, Mumbai collision data meant for analyses by the experimental collaboration. The site availability and reliability is monitored via WLCG metric. These datasets are accessed by members of CMS collaboration from all parts of the world using the Grid authentication of CMS virtual organization. A T2 centre also provides end-user support for scientists of the host country.

The T2-IN-TIFR centre is equipped with about 800 computing cores (equivalent to 7K HS06) and about 1 Petabyte of storage at present. This corresponds to, respectively, 1% and 3% of total CMS resources.

The recent enhancement in computing hardware has led to increased utilization of the T2 in terms of job execution as displayed in Figure 18. All the users from India-CMS have dedicated storage areas in the T2. The centre is presently connected with CERN by a dedicated point-to-point link of 4 Gbps which will be Figure 18. Number of jobs executed in T2-IN-TIFR during July 2014 to July 2015 upgraded soon to 10 Gbps.

At CERN end the connection is peered with other T1 centres. The recent CMS data traffic across T2-IN-TIFR is presented in Figure 19. The hardware resources and the infra-structure of the centre is upgraded in phases, while the middleware and other software upgrades are taken up on continuous basis. Thus a lot of human efforts is

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crucial to maintain the performance of the T2 at satisfactory level though mostly invisible. It also supports a T3 centre where all the members of India-CMS can perform their individual analyses.

The dedicated link also serves for the ALICE T2 centre at VECC, Kolkata as well as other research centres in the country as given in the network diagram in Figure 20. TIFR is the host institute to handle the network related issues and is the liaison between India and

Figure 19. Data traffic across T2-IN-TIFR during August 2014 to July 2015 CERN.

The connectivity with CERN has enabled the centre to be part of LHCONE network consortium from phase on. LHCONE is supported by majority of world’s NRENs and connects to majority of WLCG sites.

With the evolution of LHC data access model (Any time, Any data, Anywhere) and improved network connectivity, it has become easier for T3 users to access the Grid resources. The LHCONE connectivity is now being extended to other participating institutes from India who are part of Indian-WLCG collaboration, using a virtual private network via NKN.

The service of the T2 towards CMS computing is rewarded against mandatory service job for CMS experiment by the host institute. T2-IN- Figure 20. Schematic of Network structure at T2-IN-TIFR TIFR has been earning significant credits every year; in 2014 it was among the top 5 in CMS.

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Publications

Detector Notes

1. Saturation study of HO with SiPM readout for the choice of dynamic range and gain, CMS DN-2015/015 2. Commissioning and performance of Outer Hadron Calorimeter, CMS DN-2014/019 3. CMS Technical Design Report For the MuonEndcap GEM Upgrade, CMS-TDR-2015, (Contribution in Chapter 6 ) 4. Commissioning and performance of the CMS Hadron Outer Calorimeter, CMS DN14019 5. Simulation of Silicon Devices for the CMS Phase II Tracker Upgrade, CMS DN-2014/016 6. Calculation of HCAL sampling factors, DN-2014/033 7. Saturation Study of HO with SiPM readout for the choice of Dynamic range and gain, CMS DN-2015/015 8. Inclusion of Hadron Outer Calorimeter in Particle Flow Calibration, CMS DN-2014/026 9. Test results of 8 μ HTR cards (v1.3) for HCAL Forward back-end electronics upgrade at SINP, CMS DN- 2014/009 10. Simulation of the Shashlik Detector for the ECAL Endcap Upgrade, CMS DN - 2014/003 11. Power & Control Mezzanine testing (at SINP) for HCAL back-end upgrade for Run2 of LHC, CMS DN- 2014/007 12. Use of tracking in the CMS L1 trigger for the phase-2 upgrade, CMS DN-2014/002 13. Comparison of Single Particle Response in Data and MC at sqrt(s) = 8 TeV, CMS DN-2014/030

Journal Publications

1. Alignment of the CMS tracker with LHC and cosmic ray data, JINST 9 P06009, Published 6th June 2014

Conference Reports

1. Simulations of Inter-Strip Capacitance and Resistance for the Design of the CMS Tracker Upgrade, CMS CR-2014/126 2. Development of Radiation Damage Models for Irradiated Silicon Sensors Using TCAD Tools, CMS CR- 2014/120 3. Assembly & Characterization Of Resistive Plate Chambers In India For The Cms Detector, CMS CR- 2015/039

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Contribution of Indian Groups to CMS Physics

a) Forward and Small-x QCD Physics The activities of this PAG are grouped into 3 categories:

o Small-x QCD physics & forward-jets: Topics: QCD with semi-hard & multiple-scales, low-x PDFs, BFKL & non-linear (gluon saturation) QCD evolution, forward particle production, electroweak processes with forward jets (vector- boson-fusion) o Soft QCD & multi-parton-interactions : Topics: MPI, underlying event (UE), hadronization, beam-remnants, final-state correlations o Diffraction & Exclusive processes Topics: Pomeron- and photon-induced interactions (soft & hard)

Publications & Public Results

1. Double parton-scattering and multiple parton interactions in ATLAS+CMS, CMS CR-2013/312, PoS EPS- HEP, 438, (2013). 2. DPS studies using same-sign W boson pair production in dimuon final state with the CMS detector, CMS AN-14-196/PAS FSQ-13-001 3. Study of observables sensitive to double parton scattering in W + 2 jets process in p-p collisions at sqrt(s) = 7 TeV, CMS PAS FSQ-12-028 4. DPS measurements using W + 2-jet events, CMS Analysis Note CMS AN-13/078 (2013). 5. Measurement of Double Parton Scattering using W + 2 jets process, CMS Analysis Note, CMS AN- 2012/297 (2012). 6. Study of double parton scattering via W + 2 jet process using CMS detector at LHC, CMS CR-2015/036 7. DPS studies using same-sign W boson pair production in di-electron and electron-muon final states, CMS AN-2015/012 (2015). 8. Study of double parton scattering using W + 2-jet events in proton-proton collisions at sqrt(s) = 7 TeV, JHEP03, 032 (2014). 9. Measurement of electroweak production of two jets in association with a Z boson in proton-proton collisions at √s = 8 TeV, Eur.Phys. J. C, 75-66, (2015). 10. Measurement of exclusive Upsilon photo production in PbPb collisions at 5.02 TeV with CMS, FSQ-13-009.

b) B Physics and Quarkonia The areas in this group include:

o Quarkonium Production Bottomium States, Charmonium States o B and BB Production Inclusive Measurements, B0 and B+ Production, B0s Production, B+c Production o B Meson Decays B → K(∗)μ+μ−,B0s→μ+μ− o Baryons o Spectroscopy, Exotic States

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Publications & Public Results

1. Observation of B_s —> µ+ µ- and search for B^0 —> µ+ µ- with the 2011 and 2012 data, CMS AN-13-009 2. Angular analysis of B+/- —> K*+/- µ+ µ- at CMS, CMS AN-12-066 3. Angular analysis of B+/- —> K+/- µ+ µ- at CMS, CMS AN-14-244 0 + - 0 + - 4. Measurement of BS ->µ µ branching fraction and search for B ->µ µ with the CMS Experiment, Phys. Rev. Lett. 111, 101804 (2013). 0 + - 5. Observation of the rare BS ->µ µ decay from the combined analysis of CMS and LHCb data, Nature 522, 68-72, (2015) c) Standard Model Physics (Vector Bosons & Jets) The last century saw a remarkable progress of our understanding about the elementary constituents of matter and the nature of fundamental interactions they corroborate to. The experimental results of last few decades established the Standard Model (SM) of particle physics on firm footing by confirming the predictions of the theory. The march of SM continued in LHC era though the machine was not designed a priori for such a job. The high luminosity of LHC, essential for resolving the issue of electroweak symmetry breaking, produces large number of pile up events in the detector. But carefully designed experiments for discovering Higgs boson produced, as a by-product, spectacular results of QCD and electroweak physics. Indian groups have been involved in all aspects in multiple analyses> Starting with the study of charged and neutral Drell-Yan processes, to production of W and Z in association with multiple jets or photon to QCD oriented photon+jet productions to jet productions, a whole range of topics has been covered. The following list indicates the publications where Indian groups have contributed significantly.

Publications & Public Results

1. Measurement of φ∗ variable in Drell–Yan events in pp collisions at sqrt(s) = 8 TeV in CMS experiment, CMS-AN-14-007/SMP-15-002. 2. Rapidity distributions in exclusive Z+jet and gamma + jet events in pp collisions at sqrt(s)=7 TeV, CMS Collaboration, Phys. Rev. D., 88.112009 (2013). 3. Jet energy resolution with Z (µ+µ−)+jet events at √s = 7 TeV, CMS AN-2012/366 4. Measurement of the Z0/gamma* + Jet Angular Distributions in pp Collisions at sqrt(s) = 7 TeV with the Electron Decay Mode, CMS AN2012/135. 5. Differential cross section of jets associated to Z boson in Proton-Proton Collisions at √s=8 TeV, CMS AN- 2013/049 6. Differential cross section of jets associated to W boson in Proton-Proton Collisions at √s = 8TeV, AN- 2013/418 7. Subjet Multiplicities at LHC Energies and the QCD Color Factor Ratio CA/CF, doi:10.1155/2013/585809 8. Measurement of multijet cross-section ratios in pp collisions at √s = 8 TeV, CMS AN-2015/102 9. Measurement of Vector Boson Scattering and search for new physics at CMS with √ s= 13 TeV, CMS AN- 2015/068 10. Measurement of WW+WZ cross section and investigation of anomalous gauge boson couplings in semi- leptonic decays in pp collisions at √s=8 TeV, CMS AN-2012/464 11. Measurement of WW+ 2-jet production at √s = 8 TeV and investigation of events with vector boson fusion topology, CMS AN-2012/466 12. Measurement of electroweak vector boson productions in pp collision at CMS detector, LHC, CMS CR- 2014/193

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13. Search for W W γ and W Zγ production and constraints on anomalous quartic gauge couplings in pp collisions at √s = 8 TeV, Phys. Rev. D 90, 032008, CMS-SMP-13-009, CERN-PH-EP-2014-046. 14. Measurement of WW+WZ cross section in semi-leptonic decays in pp collisions at √s = 8 TeV, CMS AN- 2012/464 15. Study of Pileup Removal Algorithms for Jets, CMS AN-2014/175 16. Pileup Mitigation Techniques, CMS AN-2013/348 17. Study of Pileup Removal Algorithms for Jets, CMS Collaboration, CMS PAS JME-14-001 18. Measurement of single, double and triple differential production cross sections of Z boson in association with jets in pp collisions at √s= 8 TeV, CMS PAS SMP-14-013 19. Differential cross section measurements of W bosons produced in association with jets in proton-proton collisions at √s= 8 TeV, CMS PAS SMP-14-023 20. Z γ to νν γ cross section and anomalous gauge couplings at 8 TeV, PAS SMP-13-001 21. Z-> γ cross section in the MET+photon channel at 7 TeV, J. High Energy Phys. 10 (2013) 164, arXiv:1309.1117, PAS SMP-12-020 22. Measurement of triple-differential cross section for gamma+jet production in proton-proton collisions at sqrt(s) = 7 TeV, CMS AN 2011/331, CMS-PAS-QCD-11-005. 23. Measurement of the Production Cross Section for Pairs of Isolated Photons in pp collisions at sqrt(s) = 7 TeV, CMS AN 2011/070, CMS AN 2011/071, JHEP 01 (2012) 133. 24. Measurement of the differential cross section for isolated prompt photon production in pp collisions at sqrt(s) = 7 TeV, Phys. Rev. D 84, 052011 (2011). 25. Measurement of the Isolated Prompt Photon Production Cross Section in pp Collisions at sqrt(s) = 7 TeV, Phys. Rev. Lett. 106, 082001 (2011). 26. Measurement of the Underlying Event Activity in Proton-Proton Collisions at 0.9 TeV, Eur. Phys. J. C70:555, 2010. 27. Measurements of Inclusive W and Z Cross Sections in pp Collisions at sqrt(s)=7 TeV, JHEP 01 (2011) 080. 28. First Measurement of Hadronic Event Shapes in pp Collisions at sqrt (s)=7 TeV, Phys. Lett. B 699 (2011) 48- 67 29. Measurement of WW Production and Search for the Higgs Boson in pp Collisions at sqrt(s) = 7 TeV, Phys. Lett. B 699 (2011) 25-47. 30. Measurement of the lepton charge asymmetry in inclusive W production in pp collisions at sqrt(s)= 7 TeV, JHEP 04 (2011) 050. 31. Measurement of Wγ and Zγ production in pp collisions at sqrt(s) = 7 TeV, Physics Letters B 701 (2011) 535} 32. Missing transverse energy performance of the CMS detector, JHEP 09 (2011) 109 33. Measurement of the Inclusive W and Z Production Cross Sections in pp Collisions at sqrt(s) = 7 TeV, JHEP 10 (2011) 132 34. Measurement of the Drell-Yan Cross Section in pp Collisions at sqrt(s)= 7 TeV, JHEP10(2011)007 35. Jet Production Rates in Association with W and Z Bosons in pp Collisions at sqrt(s)= 7 TeV, JHEP 01 (2012) 010. 36. Measurement of transverse momentum of dimoun system at the LHC at sqrt(s)= 8 TeV, CMS PAS EWK-12- 025 37. Measurement of the production cross section for Z gamma to nu bar nu gamma in pp collisions at sqrt(s) = 7 TeV and limits on ZZ gamma and Z gamma gamma triple gauge boson couplings, http://arxiv.org/abs/1309.1117. 38. Measurement of the differential and double-differential Drell-Yan cross section in proton-proton collisions at 7 TeV, CMS PAS EWK-11-007

37 d) Top Physics The areas in this category are:

o Cross Section Measurements tt¯ Production, Dilepton, Lepton+Jets, All Jets, tt¯ + Jets, tt¯ + Vector Bosons, Single Top Production, t-Channel, tW-Channel o Mass Measurements o Properties tt¯ Charge Asymmetry, tt¯ Mass Difference, W Helicity, Spin Correlations Width o Searches High-Mass tt¯ Resonances, Four Top Production, FCNC

Publications & Public Results

1. Measurement of the top-quark mass in leptonic decays of t-channel single top events at 8 TeV at CMS, CMS AN-2014/194 2. Measurement of the single top t-channel inclusive cross section at 13 TeV, CMS AN-2015/114

e) Higgs Physics This domain includes: o The 125-GeV Higgs Boson Combinations, Mass, Couplings, Spin/Parity, Width o Decay Modes Vector Bosons, WW, ZZ, γγ, Zγ, Fermions, ττ, μμ and ee, bb, Invisible, Lepton Flavour Violating o Rare Production Modes VBF, VH, ttH

Publications & Public Results

1. Constraints on the Higgs boson width from off-shell production and decay to WW → 2l2ν, CMS-AN-2014- 19)/HIG-14-032 2. Searches for new physics in the WW →ℓνj with a merged W boson, CMS AN-2012/381 3. Tau performance after Phase I and Phase II upgrades (for the TP)/Tau performance for the Technical Proposal, CMS AN-2014-229/FTR-14-013 4. Bounding the Higgs width using ZZ → 2l2ν events with high missing transverse energy, CMS-AN-2013/411 5. Search for standard model-like Higgs boson in H→ZZ→2l2ν decay channel using MVA BDT, CMS AN- 2013/077 6. Search for an SM-like Higgs boson in the H ->WW ->lνjj decay with the full 2012 data, CMS AN-2012/463 7. Search for a heavy Higgs boson in H->ZZ->2l 2ν channel in pp collisions with CMS detector at the LHC, CMS CR-2014/060 8. Search for a Standard Model-like Higgs boson decaying into W W to νjj in p − p collisions at √s = 8 T eV, CMS-PAS-HIG-13-027 9. Constraints on the Higgs boson width from off-shell production and decay to ZZ → 4l and 2l2ν, CMS PAS HIG-14-002. 10. Precise determination of the mass of the Higgs boson and studies of the compatibility of its couplings with

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the standard model, CMS PAS HIG-14-009 11. Search for a Higgs boson in the mass range from 145 to 1000 GeV decaying to a pair of W or Z bosons, arXiv:1504.00936, CERN-PH-EP-2015-074 ; CMS-HIG-13-031, Submitted to JHEP

12. Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs, Phys. Lett. B 736 (2014) 64, CMS-HIG-14-002, CERN-PH-EP-2014-078 13. Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV, Submitted to the European Physical Journal C. CERN-PH-EP-2014-288 ; CMS-HIG-14-009 14. Search for a light charged Higgs boson in the H+→cs-bar channel at CMS, CMS AN-2013/056 15. Search for a light charged Higgs boson in the H+→cs-bar channel with lepton+jet final states at CMS, CMS AN-2014/252 16. Search for a light charged Higgs boson decaying into cs-bar at CMS, CMS CR-2014/369 17. Semi-leptonic decay of H→WW at high mass in exclusive jet bins, CMS AN-2013/414 18. Search for a light charged Higgs boson in the H+→cs-bar channel at CMS, CMS Collaboration, CMS PAS HIG-13-035 19. Search for a Standard Model-like Higgs boson decaying into WW →ℓνqq' in pp collisionsat √s = 8TeV, CMS Collaboration, CMS PAS HIG-13-008 20. Search for a Standard Model-like Higgs boson decaying into WW →ℓνqq' in exclusive jet bins in pp collisions at √s = 8 TeV, CMS Collaboration, CMS PAS HIG-14-008 21. Search for a Higgs boson in the mass range from 145 to 1000 GeV decaying to a pair W or Z bosons, CMS Collaboration, CMS PAS HIG-13-031, arXiv:1504.00936, to appear in JHEP 22. Search for a Standard Model Higgs boson in the decay channel H to ZZ to ll tau tau, J. High Energy Phys. 03 (2012) 081, arXiv:1202.3617, PAS: HIG-11-028 23. Updated results on the new boson discovered in the search for the standard model Higgs boson in the H → ZZ → 4l channel in pp collisions at √s = 7 and 8 TeV, PAS HIG-12-041 + 0 + - 24. Search for SM Higgs boson in the W -H production in pp collisions at the CMS experiment, with τ τ Higgs final state where tau decays hadronically, PAS HIG-12-053. 25. Measurement of the differential cross section of the Higgs boson in its diphoton decay channel in pp collisions at √s = 8 TeV, PAS HIG-14-016

f) Supersymmetry This category covers the following physics areas o Final States with Leptons Single Leptons, Dileptons (Opposite Sign, Same Sign), Multileptons, Hadronic Final States, Final States with b-Tagged Jets, Final States with Photons, Final States with W, Z and/or Higgs Bosons Final States with Low MET o Methods HT+MHT o Constraints Sleptons, Squarks and Gluinos, Stops and Sbottoms, Charginos, Neutralinos, Higgsinos, o Models Constrained Minimal SUSY Models, Simplified SUSY Models, Gauge Mediated SUSY Breaking Stealth SUSY, SUSY with RPV

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Publications & Public Results

1. Search for VBF produced EW gauginos in events with 2 hadronically decaying τ-leptons/Search for supersymmetry with the vector boson fusion topology in proton-proton collisions at \sqrt{s} = 8 TeV, CMS AN-2014-099/SUS-14-005 2. Study of vector boson fusion trigger paths in Run II, CMS AN-2015-089 3. Search for Direct Scalar Top-quark Pair Production in the All-hadronic Channel at 13 TeV, AN-2015/008 4. Search for supersymmetry in the multijet and missing transverse momentum channel in pp collisions at 13 TeV, AN-2015/003 5. Search for Direct Scalar Top-quark Pair Production in the All-hadronic Channel at 13 TeV, CMS AN-15-008 6. Search for supersymmetry in the multijet and missing transverse momentum channel in pp collisions at 13 TeV, CMS AN-2015/003 g) Exotica This Physics Analysis Group includes: o Leptoquarks First-Generation Leptoquarks, Second-Generation Leptoquarks, Third-Generation Leptoquarks o Randall--Sundrum Gravitons o Heavy Gauge Bosons Sequential Standard Model, Superstring-Inspired Models o Long-Lived Particles o Dark Matter o Large Extra Dimensions Arkani-Hamed--Dimopoulos--Dvali Model, Semiclassical and Quantum Black Holes o Compositness o Contact Interactions o Excited Fermions o Heavy Fermions, Heavy Righ-Handed Neutrinos o Colorons, Axigluons, Diquarks o Supersymmetry o Resonances Multijets, Dijets, Dileptons, tt¯, Dibosons, Boosted Topologies

Publications & Public Results

1. Search for High Mass Resonances and New Physics with a DiTau Pair at √s = 8 TeV, CMS AN-2014-257 2. Search for high mass exotic resonances decaying to WW in the semi-leptonic channel, CMS AN-2013/139 3. Search for new resonances decaying to WW →ℓνqq-bar in the final state with a lepton, missing transverse energy, and single reconstructed jet, CMS Collaboration, CMS PAS EXO-12-021 4. Search for new phenomena in monophoton final states in proton proton collisions at sqrt(s) = 8 TeV, arXiv:1502.02522 (submitted to Phys Lett B, PAS EXO-12-047) 5. Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy, Phys. Rev. Lett. 108, 261803 – Published 27 June 2012 arXiv:1204.0821 PAS EXO-11- 096 6. Search for excited leptons in proton proton collisions at √s = 8 TeV, PAS EXO-14-015 7. Search for excited leptons in pp collisions at √s = 7 TeV, Phys. Let. B, Volume 720, Issues 4–5, 26 March 2013, Pages 309–329

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8. A Search for excited leptons in pp Collisions at √s = 7 TeV, Phys. Lett. B, Volume 704, Issue 3, 13 October 2011, Pages 143–162, 1107.1773 (hep-ex), PAS EXO10016 9. Search for excited quarks in the photon + jet final state in proton-proton collisions at sqrt(s) = 8 TeV, AN- 2013/218, CMS PAS EXO-13-003 ,arXiv:1406.5171, Phys. Lett. B 738 (2014) 274. h) Heavy-Ion Physics 1. Y(nS) production in 5.02 TeV PbPb collisions, HIN-13-003, JHEP 04, 103 (2014) 2. psi(2S) meson production in PbPb collisions at 2.76 TeV, HIN-12-007, PRL 113, 262301 (2014). 3. Y(nS) production in PbPb collisions in different kinematic regions, HIN-15-001, 4. Studies of dijet transverse momentum balance and pseudorapidity distributions in pPb collisions at sqrt(s[NN]) = 5.02 TeV, HIN-13-001, EPJC 74, 2951, (2014). 5. Studies of jet quenching using isolated-photon + jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV, HIN-11-010, Phys. Lett. B 718, 773–794, (2013). 6. Jet momentum dependence of jet quenching in PbPb collisions at sqrt(sNN)=2.76 TeV, HIN-11-013, Phys. Lett. B 712, 176–197, (2012). 7. Heavy Ion Physics from CMS, J. Phys.: Conf. Ser. 455 012023 doi:10.1088/1742-6596/455/1/012023, (2013)

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Awards / Achievements / Distinctions (under the India-CMS umbrella)

No. Name Institute/University Award/ Distinction Month-Year DAE Science and Technical Excellence award 1 Dipanwita Dutta BARC, Mumbai 2013

DAE Science and Technical Excellence award 2 L. M. Pant BARC, Mumbai 2011

DAE Science and Technical Excellence award 3 Prashant Shukla BARC, Mumbai 2013

Member Publication Committee - CMS 4 Brajesh Choudhary DU, Delhi 2010 to 2011 Collaboration

Member Publication Committee – Exotica 5 Brajesh Choudhary DU, Delhi 2012 to 2013 Board – CMS Collaboration

Member Publication Committee – TOP-BPH 6 Brajesh Choudhary DU, Delhi 2014 to 2015 Board – CMS Collaboration Invited to Chair plenary session: "QCD 7 Brajesh Choudhary DU, Delhi Physics" at Recontres de Moriond QCD and March 2011 High Energy Interactions, La Thuile, Italy Co-convener of Inclusive SUSY Searches 8 Seema Sharma IISER, Pune Jan 2014 to present (SUSY Physics Analysis Group) 2014 9 Monika Mittal PU, Chandigarh CMS HCAL Achievement Award

Co-convener of "properties BPH sub group" 10 Sanjay Swain NISER, Bhubaneswar 2014

L2 leader for HCAL back-end upgrade October 2012 to 11 Manoj Sharan SINP, Kolkata project present

Member Advisory Committee of CERN Users 12 Manoj Sharan SINP, Kolkata (ACCU) 2014 to present

Best poster award in the International 13 Sandhya Jain SINP, Kolkata Lepton-Photon Conference, Mumbai 2011

Co-convenor of WH to Tau Hadronic 2015 14 Subir Sarkar SINP, Kolkata subgroup of Higgs Physics (and continuing)

L2 manager for (co-convenor for Central 15 Suchandra Dutta SINP, Kolkata DQM) 2010 to 2013

L2 manager (co-convenor of HCAL DPG) 16 Sunanda Banerjee SINP, Kolkata

Member, Publication Board for Standard 17 Kajari Majumdar TIFR, Mumbai Model Physics

Member of CMS Conference Committee 18 Kajari Majumdar TIFR, Mumbai 2011 to 2015

Member of the Collaboration Board 19 Kajari Majumdar TIFR, Mumbai Advisory Group (CBAG) 2011 to 2013

Member of the CMS Career Committee 20 Kajari Majumdar TIFR, Mumbai 2012 to 2014

Member of the CMS Fellows Task Force 21 Kajari Majumdar TIFR, Mumbai 2012 to 2014

Member of DAE Specialist Group for budget 22 Kajari Majumdar TIFR, Mumbai reviews in High Energy Physics, Nuclear Physics and Astrophysics

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Chair, SERB committee for School on 23 Kajari Majumdar TIFR, Mumbai Experimental High Energy Physics

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Students who completed Ph.D. from 2010-2015 (During LHC 7-8 TeV)

No Name Institute Supervisors Title of thesis Period Present Position

1 Abdulla BARC, Prashant Shukla Charmonia 2010-2015 Post Doctoral Abdulsalam HBNI production and Fellow at LLR, suppression in PbPb France collisions at 2.76 TeV with CMS

2 Vineet Kumar BARC, Prashant Shukla Study of strongly 2011 - Scientific Officer E, HBNI interacting matter 2015 at NPD, BARC using dimuons in PbPb collisions at 2.76 TeV

3 Arun Kumar DU, Delhi Kirti Ranjan Search for the 2009 - Post Doctoral standard model Higgs 2014 Fellow at NTU, boson in the Taiwan

channel in the CMS Experiment at the LHC

4 Ajay Kumar DU, Delhi Kirti Ranjan Search for the SM 2010 - Post Doctoral Higgs boson in the 2015 Fellow at Purdue University. of WW production in vector boson fusion topology in the CMS Experiment at the LHC 5 Pooja Saxena DU, Delhi Kirti Ranjan Characteristics of 2008 - Post Doctoral silicon detectors and 2013 Fellow at DESY study of large pt particle production at collider energies

6 Ranjeet DU, Delhi Ashutosh Performance 2010- Bhardwaj Characteristics of Si 2015 Sensors at Collider Experiments 7 Shivali DU, Delhi Md. Naimuddin Model Independent 2010 - Malhotra Search for New 2015 Physics at LHC energies 8 Sudha Ahuja DU, Delhi Brajesh C. Study of Direct 2007-2013 Postdoctoral Choudhary Photon Physics at fellow at SPARCE, CMS Brazil 9 Sushil Singh DU, Delhi Brajesh C. Search for Quark 2004-2010 Post Doctoral Chauhan Choudhary Compositeness at Fellow at UC, & sqrt(s) = 14 TeV at the Davis. Raghuvir Singh Large Hadron Collider

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10 Anil Pratap PU, Suman Bala Beri EARLY SUSY 2006-2012 Singh Chandigarh SEARCHES AND STUDY OF RADIATION ENVIRONMENT IN CMS EXPERIMENT AT LHC 11 Archana PU, Suman Bala Beri STUDY OF W->μυ 2006-2013 Post Doctoral Sharma Chandigarh CHANNEL AND MUON Fellow at Bari, TRIGGERS FOR CMS Italy. EXPERIMENT AT LHC

12 Lovedeep Kaur PU, Suman Bala Beri STUDY OF Z+JETS 2007-2013 Post Doctoral Saini Chandigarh WITH CMS DETECTOR Fellow at Fermilab AT LHC 13 Manuk PU, Manjit Kaur STUDY OF HADRONIC 2007-2013 Faculty at APS, Z. Mehta Chandigarh JET STRUCTURE AND Devlali, Nasik SUBJET MULTIPLICITY IN p-p COLLISIONS AT LHC 14 Monika Jindal PU, J B Singh DRELL-YAN STUDY IN 2007- Faculty at D. A. V. Chandigarh & CMS EXPERIMENT AT 2012 College, V Bhatnagar LARGE HADRON Chandigarh COLLIDER 15 Monika PU, Manjit Kaur STUDY OF Z->μ+μ- + 2010-2015 Mittal Chandigarh JETS WITH VBF IN PP & COLLISIONS AT LHC USING CMS Shashi Dugad DETECTOR 16 Nishu PU, Suman Bala Beri STUDY OF 2008-2014 Chandigarh ASSOCIATED HIGGS & PRODUCTION WITH WH -> WWW* ->lνlνlν Vipin Bhatnagar AT LHC ENERGY USING CMS DETECTOR

17 Nitish Dhingra PU, J B Singh SEARCH FOR A HEAVY 2009-2013 Faculty at G. H. G Chandigarh & NEUTRAL GAUGE Khalsa College, K Mazumdar BOSON THROUGH ITS Ludhiana TAU PAIR DECAY MODE USING CMS DETECTOR AT THE LHC

18 Ruchi Gupta PU, Manjit Kaur STUDY OF MULTIJET 2009-2014 Post Doctoral Chandigarh EVENT IN p-p Fellow at & COLLISIONS AT 7 TEV Southern USING THE CMS Methodist Sunanda Banerjee DETECTOR AT THE Univeristy, USA LHC 19 Sunil Bansal PU, J B Singh SEARCH FOR HIGGS 2006- Faculty at UIET, Chandigarh & BOSON USING ITS 2010 Panjab University, K Mazumdar INVISIBLE DECAY Chandigarh MODE IN CMS EXPERIMENT AT

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LARGE HADRON COLLIDER 20 Supreet Pal PU, J B Singh SEARCH FOR AND 2006-2010 Faculty at Punjabi Singh Chandigarh & OTHER RARE DECAYS University, Patiala K Mazumdar OF B MESONS WITH CMS DETECTOR AT LHC 21 Bhawna SINP, Satyaki Search of large extra 2009-2014 Post Doctoral Gomber Kolkata Bhattacharya dimensions in Fellow at gamma+ MET final University of state in pp collisions Wisconsin, with the CMS Madison, USA detector at the LHC 22 Debarati Roy SINP, Sunanda Banerjee Study Of Hadronic 2011-2015 Kolkata & Event-Shape Variables Manoj Sharan In CMS 23 Raman SINP, Satyaki Search for ADD large 2007-2014 Post Doctoral Khurana Kolkata Bhattacharya extra dimensions in Fellow at NCU, gamma+MET using Taiwan the CMS detector at the LHC 24 Sandhya Jain SINP, Satyaki Search for excited 2007-2014 Post Doctoral Kolkata Bhattacharya electrons in pp Fellow at TIFR. collisions with the CMS detector at LHC 25 Shilpi Jain SINP, Satyaki Search for Higgs 2009-2014 Post Doctoral Kolkata Bhattacharya Boson in H->ZZ- Fellow at NCU, >2l2tau decay channel Taiwan in pp collision with the CMS detector at the LHC 26 Swagata SINP, Sunanda Banerjee Measurement of the 2011-2015 Mukherjee Kolkata & differential cross Manoj Shaaran section of the Higgs boson in its diphoton decay channel in pp collisions at √s = 8 TeV 27 Bibhuti Parida TIFR, G B Mohanty Search for a standard 2010-2015 Mumbai (TIFR) model-like Higgs & boson decaying into S N Nayak W+W− ℓ (Sambalpur pp collision data University) recorded by the CMS detector at LHC 28 Gouranga Kole TIFR, G B Mohanty Search for a light 2009-2015 Mumbai (TIFR) charged Higgs boson in the H+ with the CMS detector

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Students currently enrolled for Ph.D.

No Name Institute/University Supervisors Title of thesis Year of enrolment 1 Ruchi Chudasama BARC, Mumbai Dipanwita Dutta Study of exclusive 2012 quarkonia production in UPC with CMS 2 Aashaq Shah DU, Delhi Ashok Kumar New Phenomena 2013 Searches at LHC energies 3 Geetika Jain DU, Delhi Ashutosh Bhardwaj Design and 2013 Characterization of the Silicon Strip Sensors for the Future Hadron Colliders. 4 Mohit Gola DU, Delhi Ashok Kumar Probing physics in 2014 standard model and beyond using CMS detector at LHC 5 Priyanka DU, Delhi Kirti Ranjan Tests of the 2014 & Standard Model Ashutosh Bhardwaj and Possible Searches for Physics beyond the Standard Model in the CMS Experiment 6 Ramkrishna Sharma DU, Delhi Md. Naimuddin * 7 Rocky Bala Garg DU, Delhi Brajesh C. Choudhary Search for b* at 2011 CMS 8 Sumit Keshri DU, Delhi Kirti Ranjan Study of some 2013 aspects of High momentum transfer processes in the CMS Experiment at the LHC, CERN 9 Varun Sharma DU, Delhi Brajesh C. Choudhary Search for excited 2010 & quarks at sqrt (s) = Debajyoti Choudhury 8 TeV at CMS 10 Aditee Rane IISER, Pune Seema Sharma * 2014 11 Anshul Kapoor IISER, Pune Sourabh Dube * 2013 12 Deepak Sharma IISER, Pune Seema Sharma * 2014

13 Kunal Kothekar IISER, Pune Sourabh Dube * 2012 14 Shubhanshu Chauhan IISER, Pune Sourabh Dube * 2013 15 Shubham Pandey IISER, Pune Seema Sharma * 2014 16 Vinay Hegde IISER, Pune Seema Sharma * 2014

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17 Amrita Purkayastha IITB, Mumbai Pradeep Sarin * 2015

18 Indrani Nayak IITB, Mumbai Pradeep Sarin * 2015 19 Jetendra Upadhyay IITM, Chennai Prafulla Kumar Behera * 2014 20 Ravindran IITM, Chennai James Libby * 2014 21 Deepak Kumar Sahoo NISER, Seema Bahinipati Flavor tagging 2014 Bhubaneswar techniques 22 Koushik Mandal NISER, Sanjay Kumar Swain Direct STOP search 2013 Bhubaneswar with fully hadronic decay using CMS data 23 Niladri Bihari Sahoo NISER, Sanjay Kumar Swain Search for new 2011 Bhubaneswar physics with Bs- >µµ and B ->K*µµ using CMS data 24 Amandeep Kaur Kalsi PU, Chandigarh J B Singh SEARCH FOR 2011 & SUPERSYMMETRY Vipin Bhatnagar IN DITAU FINAL STATE THROUGH VECTOR BOSON FUSION PROCESSES WITH THE CMS DETECTOR AT LHC 25 Ankita Mehta PU, Chandigarh J B Singh STUDY OF DI- 2012 & BOSON PROCESSES V Bhatnagar IN CMS EXPERIMENT AT LARGE HADRON COLLIDER

26 Anterpreet Kaur PU, Chandigarh Manjit Kaur MEASUREMENT OF 2013 MULTIJET CROSS- SECTION RATIOS IN PROTON- PROTON COLLISIONS WITH THE CMS DETECTOR AT THE LHC

27 Bhawandeep PU, Chandigarh Suman Bala Beri MEASUREMENT OF 2010 Z+JETS CROSS SECTION AND STUDY OF THIS CHANNEL AT LHC ENERGY USING CMS DETECTOR 28 Genius Walia PU, Chandigarh Manjit Kaur STUDY OF DRELL- 2012 YAN & PROCESS(qqbar- >Z/gamma*->μ+μ-) Slawomir IN p-p COLLISIONS MarekTkaczyk USING CMS

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DETECTOR AT LHC

29 Priyanka PU, Chandigarh J B Singh SUSY SEARCHES 2014 Kumari & VIA TAUS IN FINAL V Bhatnagar STATE WITH THE CMS DETECTOR AT LHC (TENTATIVE) 30 Ramandeep Kumar PU, Chandigarh J B Singh STUDY OF DOUBLE 2012 & PARTON V Bhatnagar SCATTERING IN CMS EXPERIMENT AT LARGE HADRON COLLIDER 31 Ridhi PU, Chandigarh Manjit Kaur STUDIES OF THE 2012 Chawla DRELL-YAN & PROCESS IN THE CMS Slawomir DETECTOR AT THE MarekTkaczyk LHC 32 Sandeep Kaur PU, Chandigarh Suman Bala Beri STUDY OF Z(->μμ) 2014 +JETS AT √ s =13 & TEV V Bhatnagar (TENTATIVE) 33 Arnab Purohit SINP, Kolkata Satyaki Bhattacharya Study of properties 2014 of the Higgs boson using its diphoton decay mode 34 Asim Roy SINP, Kolkata Satyaki Bhattacharya Search for physics 2013 beyond the & Standard Model in gamma+MET final Sunanda Banerjee state in proton proton collisions, using the Compact Muon Solenoid Detector at the Large Hadron Collider

35 Atanu Modak SINP, Kolkata Subir Sarkar Search for the 2013 Standard Model & Higgs boson decaying to a Tau Suchandra Dutta lepton pair in proton-proton collisions using the CMS detector at the LHC 36 Kalyanmoy Chatterjee SINP, Kolkata Suchandra Dutta Search for the 2011 Standard Model & Higgs boson decaying to a pair Subir Sarkar of τ -leptons produced in association with a

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W boson using CMS data at the LHC 37 Kuntal Mondal SINP, Kolkata Suchandra Dutta Study of the 2013 properties of the & Standard model Higgs boson Sunanda Banerjee decaying to a pair of photons in proton proton collisions using the CMS detector 38 Rajarshi Bhattacharya SINP, Kolkata Subir Sarkar * 2014 39 Shamik Ghosh SINP, Kolkata Satyaki Bhattacharya Seach for new 2014 phenomena in final states with a single photon and missing transverse energy in p-p collisions 40 Saswati Nandan SINP, Kolkata Subir Sarkar * 2014 41 Sourav Dey SINP, Kolkata Subir Sarkar Measurement of 2012 Inclusive Jet Cross- & Section in proton- proton Collisions at Sunanda Banerjee √s = 13TeV using the CMS Detector at the LHC

42 Suvankar Roy SINP, Kolkata Subir Sarkar Study of the 2013 Choudhury & properties of the Sunanda Banerjee Standard Model Higgs boson in the H → ZZ → 4l final states in proton- proton collisions at √s = 13-14 T eV using the CMS detector at the LHC 43 Bibhuprasad Mahakud TIFR, Mumbai G B Mohanty Search for new 2011 physics using fully hadronic final states at LHC 44 Nairit Sur TIFR, Mumbai T. Aziz Search for the 2010 exotic charged Z(4430)+ state in the CMS detector 45 Muzamil Ahmad Bhat TIFR, Mumbai T. Aziz * 2015 46 Soureek Mitra TIFR, Mumbai T. Aziz Measurement of 2010 the t-channel single top cross section and top quark mass using single top events in CMS experiment at

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LHC 47 Sandeep Bhowmik Viswa Bharati Manas Maity Study on Strong Interaction in pp Collisions with the CMS Detector 48 Tanmay Sarkar Viswa Bharati Manas Maity *

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* To be decidedTalks presented in Conferences/Symposia/Workshops

Name Institute/University Title of Talk Conference/ Month-Year Workshop/School 1 Abdulla BARC Upsilon production in pp, Quark Matter 2014, May 2014 Abdulsalam pPb and PbPb collisions GSI, Germany at CMS 2 Abdulla BARC Measurement of prompt ICPAQGP-15, VECC, February Abdulsalam psi(2S) to J/psi yield Kolkata 2015 3 Dipanwita Dutta BARC Minimum Bias, MPI and ICHEP, Valencia, Spain July 2014 DPS, and Diffractive and Exclusive measurements at CMS 4 Dipanwita Dutta BARC Exclusive and Diffractive DAE Symposium, December results from CMS Nuclear Physics, 2014 Varanasi 5 L. M. Pant BARC Single Mask GEM Foil RD51 Collaboration October Development in India Meeting, VECC, 2014 Kolkata 2014 6 L. M. Pant BARC CMR RPC Performance International October and Upgrade Workshop on 2014 Advanced Detectors, VECC, Kolkata 2014 7 Pawan Netrakanti BARC Overview of Jet ICPAQGP-15, VECC, February measurements with CMS Kolkata 2015 8 Prashant Shukla BARC Quarkonia and Heavy Int. Conf. on Matter at January 2014 Flavour production with Extreme Conditions, CMS Bose Institute, Kolkata 9 Prashant Shukla BARC Upsilon measurements by ICPAQGP-15, VECC, February 2015 CMS PbPb collisions Kolkata 10 Ruchi Chudasama BARC Exclusive photo- ICPAQGP-15, VECC, February 2015 production of upsilon in Kolkata pPb collisions with the CMS 11 Vineet Kumar BARC Overview of Quarkonia ICPAQGP-15, VECC, February 2015 measurements with CMS Kolkata 12 Ajay Kumar DU, Delhi Probe of WW Production April Meeting of the April 2014 in vector boson fusion American Physics topology Society, Savannah, GA (USA) 13 Ajay Kumar DU, Delhi Measurement of Second Annual LHCP June 2014 electroweak vector boson Conference, Columbia production in pp collision University, New York at CMS detector, LHC City (USA)

14 Ajay Kumar DU, Delhi Measurement of New Perspectives June 2014 electroweak vector boson Conference, Fermilab pair productions in pp (USA) collision at CMS detector, LHC

15 Arun Kumar DU, Delhi Search for a heavy Higgs 46th Recontres de March 2014 boson in H → ZZ→ 2l2ν Moriond, La Thuile, channel in pp collisions Italy with CMS detector at LHC

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16 Ranjeet Dalal DU, Delhi Simulations of Hadron 24th RD-50 June 2014 Irradiation Effects for Si Conference, Bucharest, Sensors Using Effective Romania Bulk Damage Model 17 Ranjeet Dalal DU, Delhi TCAD Simulations of 25th RD-50 November Irradiated Si Sensors Conference, CERN 2014 (Switzerland) 18 Shivali Malhotra DU, Delhi Model Independent Contemporary Trends March 2014 search for new physics in High Energy Physics with pp Collisions at CMS and Experimentation, Chandigarh, Panjab University

19 Shivali Malhotra DU, Delhi Measuring the Properties ICHEP 2014, Valencia, July 2014 of the Higgs boson at CMS Spain 20 Shivali Malhotra DU, Delhi Measurement of the Particles and Nuclei August 2014 Properties of the new International (Higgs) boson Conference (PANIC), Hamburg, Germany 21 Varun Sharma DU, Delhi Resonance search for ICHEP 2014, Valencia, July 2014 quark excitation in the Spain gamma + jet final state at CMS 22 Pradeep Sarin IITB, Mumbai Heavy ion physics from International December 3- CMS Workshop 7, 2012 on Discovery Physics at the LHC, Kruger park, South Africa 23 Prolay Kumar Mal NISER, Bhubaneswar Search for the Higgs XXI DAE-BRNS HEP December 8- invisible decays at the LHC Symposium, IIT 12, 2014 Guwahati 24 Prolay Kumar Mal NISER, Bhubaneswar Search for the Higgs boson 25th Workshop on June 8-13, in the associated Weak Interactions & 2015 production excluding ttH Neutrinos, Heidelberg, (Run 1 results & Run 2 Germany perspective) 25 Sanjay K Swain NISER Bhubaneswar Recent B-physics results LHC physics and 2014 from LHC (CMS, ATLAS beyond, and LHCb) Vietnam 26 Sanjay K Swain NISER Bhubaneswar Recent results on B- DAE Symposium, IIT >K*µµ with CMS data Guwahati 2014 27 Sanjay K Swain NISER Bhubaneswar Flavor Physics at LHC CERN-Bangladesh LHC 2014 school 28 Ankita Mehta PU, Chandigarh Double parton scattering XXI DAE-BRNS High December, studies via di-boson Energy Physics 2014 processes using the CMS Symposium 2014, detector at LHC Indian Institute of Technology, Guwahati 29 Amandeep Kaur PU, Chandigarh Granularity Studies GEM Workshop IX, at July,2014 Kalsi CERN 30 Genius Walia PU, Chandigarh Measurement of phi* XXI DAE-BRNS High December, variable in Drell-Yan Energy Physics 2014 events in p-p collisions Symposium 2014, with 8 TeV data Indian Institute of Technology, Guwahati

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31 Ramandeep Kumar PU, Chandigarh Double Parton Scattering MPI@LHC2012:Fourth December, via W+2jets International 2012 Workshop on Multiple Partonic Interactions at the LHC at CERN, Geneva 32 Ramandeep Kumar PU, Chandigarh Study of Double Parton XX DAE-BRNS January 13- Scattering Contributions Symposium on High 18,2013 to W+2jet production in Energy Physics, Visva pp collisions at 7TeV Bharati. 33 Ramandeep Kumar PU, Chandigarh Double parton-scattering EPS-HEP 2013 July 18-24, and multiple parton Conference at 2013 interactions in Stockholm, Sweden ATLAS+CMS 34 Ramandeep Kumar PU, Chandigarh DPS using W + jets Belgian-Indian September, Workshop at Panjab 2013 University 35 Ramandeep Kumar PU, Chandigarh Study of double parton XXI DAE-BRNS High December, scattering via W + 2-jet Energy Physics 2014 process using CMS Symposium 2014, detector at LHC Indian Institute of Technology, Guwahati 36 Ramandeep Kumar PU, Chandigarh Assembly & XXI DAE-BRNS High December, characterization of Energy Physics 2014 Resistive Plate Chambers Symposium 2014, in India for the CMS Indian Institute of detector Technology, Guwahati

37 Debarati Roy SINP, Kolkata Hadronic event shapes in ICHEP conference in July 22-27, pp collisions at 7 TeV 2014, Valencia, Spain 2014 38 Kuntal Mondal SINP, Kolkata CUPS - CMS Upgrade November School, DESY, 17-21, 2014 Hamburg, Germany 39 Suvankar Roy SINP, Kolkata CUPS - CMS Upgrade November Choudhury School, DESY, 17-21, 2014 Hamburg, Germany 40 Bibhuti Parida TIFR Search for a standard APS Meeting, April 2015 model-like Higgs boson Baltimore, Maryland, decaying into W+W− USA ℓ

41 G.B. Mohanty TIFR Quarkonia, Resonances 20th Particles and August 2014 and Spectroscopy Nuclei International Conference, Hamburg, Germany 42 G.B. Mohanty TIFR Rare B Decays at CMS and 8th International September Prospects with the CMS Workshop on the 2014 Upgrade Unitarity Triangle, Vienna, Austria 43 G. K. Kole TIFR Search for a Low-mass Workshop on September Charged Higgs Boson Prospects for Charged 2014 H+ -bar in tt-bar events Higgs Discovery at at CMS Colliders, Uppsala, Sweden 44 G. K. Kole TIFR Search for a Low-mass XXI DAE-BRNS High December

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Charged Higgs Boson Energy Physics 2014 H+ -bar in tt-bar events Symposium, IIT at CMS Guwahati, Assam 45 Kajari Mazumdar TIFR Open beauty production International December in pp collisions at 7 TeV Conference on Particle 2010 with CMS Astrophysics and Quark Gluon Plasma (ICPAQGP), Goa 46 Kajari Mazumdar TIFR Underlying Events at LHC QUARKS, HADRONS August 28-30, and LHC, satellite 2011 meeting of Lepton Photon conference, IIT Bombay 47 Kajari Mazumdar TIFR Search for Super Parellel session on July 4-11, Symmetry with one lepton Search for 2012 in the final state SuperSymmetry, International Conference on High Energy Physics (ICHEP), Melbourne 48 Kajari Mazumdar TIFR Characterization of Parallel session, Deep 2013 underlying event in CMS Inelastic Scattering, experiment at LHC Marseilles, France 49 Kajari Mazumdar TIFR Study of B>K(*)mu+mu- Parallel session, July 2014 decays at CMS experiment International Conference on High Energy Physics (ICHEP), Valencia, Spain 50 Kajari Mazumdar TIFR Status of CMS experiment Plenary session at August 2015 at LHC Lomonosov conference, Moscow 51 Manas Maity Visva Bharati Searches for the Higgs EWSB and Flavour February 20- Boson(s) at the LHC Physics in the light of 22, 2014 the LHC , IIT Guwahati 52 Manas Maity Visva Bharati Search for Supersymmetry LHC and Dark Matter, February 23- - CMS Results IACS, Kolkata 28, 2015

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New Faculty / Institutes

No. Members Institute/University Whether approved Date of Joining by India-CMS (yes/no) 1 Somnath Choudhury IISER Bhopal No* (Associate member of NISER, Bhubaneswar)

2 Saurabh Dubey IISER, Pune Yes

3 Seema Sharma IISER, Pune Yes Deepak Kumar Sahoo IIT Bhubaneswar Yes 04-11-2014 4 (Associate member of NISER, Bhubaneswar)

5 Seema Bahinipati IIT Bhubaneswar Yes 04-11-2014 (Associate member of NISER, Bhubaneswar)

6 James Libby IIT Madras Yes Nov. 2014 7 Prafulla Behera IIT Madras Yes Nov. 2014

8 Suneel Dutt Shoolini University No* (Associate member of SINP)

9 Sunil Bansal UIET, Panjab University No* (Associate member of Panjab University)

*waiting for task force approval and MOU yet to be signed

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Contact Information for India-CMS Members Sr No. Name Institute Designation Email address 1 Ajit Kumar Mohanty* BARC, Mumbai Faculty [email protected] 2 Anita Topkar -do- Faculty [email protected] 3 Dipak Kumar Mishra -do- Faculty dipak.mishra@cern.ch 4 Dipanwita Duta -do- Faculty [email protected] 5 Lalit Mohan Pant -do- Faculty [email protected] 6 Pawan Kumar Netrakanti -do- Faculty [email protected] 7 Prashant Shukla -do- Faculty [email protected] 8 Vineet Kumar -do- Faculty [email protected] 9 Vishwajeet Jha -do- Faculty [email protected] 10 Ruchi Chudasama -do- Student [email protected] 11 Somnath Choudhury IISER, Bhopal Faculty [email protected] 12 Seema Sharma IISER, Pune Faculty [email protected] 13 Sourabh Shishir Dube -do- Faculty [email protected] 14 Shubhanshu Chauhan -do- Student [email protected] 15 Kunal Kothekar -do- Student [email protected] 16 Anshul Kapoor -do- Student [email protected] 17 Angira Rastogi -do- Student [email protected] 18 Aditee Rane -do- Student [email protected] 19 Vinay Hegde -do- Student [email protected] 20 Shubham Pandey -do- Student [email protected] 21 Seema Bahinipati IIT, Bhubaneswar Faculty [email protected] 22 Deepak Kumar Sahoo -do- Student [email protected] 23 James Libby IIT, Madras Faculty [email protected] 24 Prafulla Bhehra -do- Faculty [email protected] 25 Pradeep Sarin IIT, Mumbai Faculty [email protected] 26 Amrita Purkayastha -do- Student [email protected] 27 Indrani Nayak -do- Student [email protected] 28 Prolay Kumar Mal NISER, Bhubaneswar Faculty [email protected] 29 Sanjay Kumar Swain -do- Faculty [email protected] 30 Koushik Mandal -do- Student [email protected] 31 Mohammad Mustakim -do- Student [email protected] 32 Niladribihari Sahoo -do- Student [email protected] 33 Jasbir Singh PU, Chandigarh Faculty [email protected] 34 Manjit Kaur -do- Faculty [email protected] 35 Suman Bala Beri -do- Faculty [email protected] 36 Sunil Bansal -do- Faculty [email protected] 37 Vipin Bhatnagar -do- Faculty [email protected] 38 Amandeep Kaur Kalsi -do- Student [email protected] 39 Ankita Mehta -do- Student [email protected] 40 Anterpreet Kaur -do- Student [email protected] 41 Bhawandeep Kaur -do- Student [email protected] 42 Genius Walia -do- Student [email protected] 43 Monika Mittal -do- Student [email protected] 44 Priyanka Pathania -do- Student [email protected] 45 Ramandeep Kumar -do- Student [email protected] 46 Ridhi Chawla -do- Student [email protected] 47 Sandeep Kaur -do- Student [email protected] 48 Manoj Sharan SINP, Kolkata Faculty [email protected] 49 Nayana Majumdar -do- Faculty [email protected] 50 Satyaki Bhattacharya -do- Faculty [email protected] 51 Subir Sarkar -do- Faculty [email protected] 52 Suchandra Dutta -do- Faculty [email protected] 53 Supratik Mukhopadhyay -do- Faculty [email protected] 54 Arnab Purohit -do- Student [email protected] 55 Ashim Roy -do- Student [email protected]

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56 Atanu Modak -do- Student [email protected] 57 Debarati Roy -do- Student [email protected] 58 Kalyanmoy Chatterjee -do- Student [email protected] 59 Kuntal Mondal -do- Student [email protected] 60 Rajarshi Bhattacharya -do- Student [email protected] 61 Saswati Nandan -do- Student [email protected] 62 Shamik Ghosh -do- Student [email protected] 63 Swagata Mukherjee -do- Student [email protected] 64 Sourav Dey -do- Student [email protected] 65 Suvankar Roy Chowdhury -do- Student [email protected] 66 Suneel Dutt Shoolini Univ., Solan Faculty [email protected] 67 Bipen Singh -do- Student [email protected] 68 Rishika Bhardwaj -do- Student [email protected] 69 Shalini Thakur -do- Student [email protected] 70 Gagan Mohanty TIFR, Mumbai Faculty [email protected] 71 Gobinda Majumder -do- Faculty [email protected] 72 Kajari Majumdar -do- Faculty [email protected] 73 Monoranjan Guchait -do- Faculty [email protected] 74 Shashi Dugad -do- Faculty [email protected] 75 Sudeshna Banerjee -do- Faculty [email protected] 76 Tariq Aziz -do- Faculty [email protected] 77 Bajrang Janu Sutar -do- Student [email protected] 78 Bibhuprasad Mahakud -do- Student [email protected] 79 Bibhuti Parida -do- Student [email protected] 80 Gouranga Kole -do- Student [email protected] 81 Muzamil Ahmad Bhat -do- Student [email protected] 82 Nairit Sur -do- Student [email protected] 83 Rajdeep Mohan Chatterjee -do- Student [email protected] 84 Ram Krishna Dewanjee -do- Student [email protected] 85 Sanjeev Kumar** -do- Student [email protected] 86 Saranya Samik Gosh -do- Student [email protected] 87 Soureek Mitra -do- Student [email protected] 88 Brij Kishor Jashal TIFR, Mumbai Engineer [email protected] 89 Mandakini Ravindra Patil -do- Engineer [email protected] 90 Raghunandan Atul Shukla -do- Engineer [email protected] 91 Sanjay Rajaram Chendvankar -do Engineer [email protected] 92 Ashok Kumar University of Delhi Faculty [email protected] 93 Ashutosh Bhardwaj -do- Faculty [email protected] 94 Brajesh Chandra Choudhary -do- Faculty [email protected] 95 Kirti Ranjan -do- Faculty [email protected] 96 Md Naimuddin -do- Faculty [email protected] 97 Aashaq Hussain Shah -do- Student [email protected] 98 Geetika Jain -do- Student [email protected] 99 Mohit Gola -do- Student [email protected] 100 Priyanka -do- Student [email protected] 101 Ram Krishna Sharma -do- Student [email protected] 102 Rocky Bala Garg -do- Student [email protected] 103 Sumit Keshri -do- Student [email protected] 104 Varun Sharma -do- Student [email protected] 105 Manas Maity Visva Bharti Faculty [email protected] 106 Sandeep Bhowmik -do- Student [email protected] 107 Tanmay Sarkar -do- Student [email protected]

* Currently Director in SINP

** Currently faculty in Rajasthan University, Jaipur and registered as part-time student in TIFR

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Election of India-CMS Spokesperson for the term 2015 – 2017

In the last India-CMS meeting held at Panjab University, Chandigarh during 20-21 March, 2015, the Election Committee for organising the election of India-CMS Spokesperson for the two years term starting from August 2015 was constituted.

Following were the members of the EC:

Prof. Manjit Kaur PU, Chandigarh

Dr. L. M. Pant BARC, Mumbai

Dr. Gagan Mohanty TIFR, Mumbai

Dr. Md. Naimuddin DU, Delhi

Dr. Satyaki Bhattacharya SINP, Kolkata

The EC is responsible for the smooth conduct of elections.

Announcement of India-CMS Spokesperson and Deputy Spokesperson

During the India-CMS meeting, at NISER Bhubaneswar, on 1st August 2015, election was conducted for the India-CMS Spokesperson and the Deputy Spokesperson for the term August 2015 - August 2017 and the results of the election were announced as follows:

Spokesperson: Prof. Kajari Mazumdar TIFR, Mumbai

Deputy Spokesperson: Prof. Manjit Kaur Department of Physics Panjab University, Chandigarh

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