Upgrade of the Global Muon Trigger for the Compact Muon Solenoid Experiment at CERN”
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The Moedal Experiment at the LHC. Searching Beyond the Standard
126 EPJ Web of Conferences , 02024 (2016) DOI: 10.1051/epjconf/201612602024 ICNFP 2015 The MoEDAL experiment at the LHC Searching beyond the standard model James L. Pinfold (for the MoEDAL Collaboration)1,a 1 University of Alberta, Physics Department, Edmonton, Alberta T6G 0V1, Canada Abstract. MoEDAL is a pioneering experiment designed to search for highly ionizing avatars of new physics such as magnetic monopoles or massive (pseudo-)stable charged particles. Its groundbreaking physics program defines a number of scenarios that yield potentially revolutionary insights into such foundational questions as: are there extra dimensions or new symmetries; what is the mechanism for the generation of mass; does magnetic charge exist; what is the nature of dark matter; and, how did the big-bang develop. MoEDAL’s purpose is to meet such far-reaching challenges at the frontier of the field. The innovative MoEDAL detector employs unconventional methodologies tuned to the prospect of discovery physics. The largely passive MoEDAL detector, deployed at Point 8 on the LHC ring, has a dual nature. First, it acts like a giant camera, comprised of nuclear track detectors - analyzed offline by ultra fast scanning microscopes - sensitive only to new physics. Second, it is uniquely able to trap the particle messengers of physics beyond the Standard Model for further study. MoEDAL’s radiation environment is monitored by a state-of-the-art real-time TimePix pixel detector array. A new MoEDAL sub-detector to extend MoEDAL’s reach to millicharged, minimally ionizing, particles (MMIPs) is under study Finally we shall describe the next step for MoEDAL called Cosmic MoEDAL, where we define a very large high altitude array to take the search for highly ionizing avatars of new physics to higher masses that are available from the cosmos. -
EPS-HEP 2017 Report of Contributions
EPS-HEP 2017 Report of Contributions https://indico.cern.ch/e/epshep2017 EPS-HEP 2017 / Report of Contributions Theory overview on FCNC B-decays Contribution ID: 10 Type: Parallel Talk Theory overview on FCNC B-decays Thursday, 6 July 2017 09:00 (30 minutes) LHCb experiment at CERN has recently reported a set of measurements on lepton flavour univer- sality in b to s transitions showing a departure from the Standard Model predictions. I will review the main ideas recently put forward to make sense out of these intriguing hints. Focusing on the new physics explanation, I will discuss the correlated signals expected in other low- and high- energy observables, that could help clarify the mysterious signal. Experimental Collaboration Primary author: GRELJO, Admir (University of Zurich) Presenter: GRELJO, Admir (University of Zurich) Session Classification: Flavour and symmetries Track Classification: Flavour Physics and Fundamental Symmetries October 6, 2021 Page 1 EPS-HEP 2017 / Report of Contributions Charm Quark Mass with Calibrate … Contribution ID: 11 Type: Parallel Talk Charm Quark Mass with Calibrated Uncertainty Friday, 7 July 2017 12:35 (13 minutes) We determine the charm quark mass mc(mc) from QCD sum rules of moments of the vector cur- rent correlator calculated in perturbative QCD. Only experimental data for the charm resonances below the continuum threshold are needed in our approach, while the continuum contribution is determined by requiring self-consistency between various sum rules, including the one for the ze- roth moment. Existing data from the continuum region can then be used to bound the theoretical error. Our result is mc(mc) = 1272 ± 8 MeV for αs(MZ ) = 0:1182. -
Formation of Centauro and Strangelets in Nucleus–Nucleus Collisions at the LHC and Their Identification by the ALICE Experiment 1 A.L.S
HE.6.2.02 Formation of Centauro and Strangelets in Nucleus–Nucleus Collisions at the LHC and their Identification by the ALICE Experiment 1 A.L.S. Angelis1,J.Bartke2, M.Yu. Bogolyubsky3, S.N. Filippov4, E. Gładysz-Dziadus´2, Yu.V. Kharlov3,A.B.Kurepin4, A.I. Maevskaya4, G. Mavromanolakis1, A.D. Panagiotou1, S.A. Sadovsky3,P.Stefanski2 and Z. Włodarczyk5 1Division of Nuclear and Particle Physics, University of Athens,Greece. 2Institute of Nuclear Physics, Cracow, Poland. 3Institute for High Energy Physics, Protvino, Russia. 4Institute for Nuclear Research, Moscow,Russia. 5Institute of Physics, Pedagogical University, Kielce, Poland. Abstract We present a phenomenological model which describes the formation of a Centauro fireball in nucleus-nucleus interactions in the upper atmosphere and at the LHC, and its decay to non-strange baryons and Strangelets. We describe the CASTOR detector for the ALICE experiment at the LHC. CASTOR will probe, in an event- by-event mode, the very forward, baryon-rich phase space 5.6 ≤ η ≤ 7.2in5.5×A TeV central Pb + Pb collisions. We present results of simulations for the response of the CASTOR calorimeter, and in particular to the traversal of Strangelets. 1 Introduction: The physics motivation to study the very forward phase space in nucleus–nucleus collisions stems from the potentially very rich field of new phenomena, to be produced in and by an environment with very high baryochemical potential. The study of this baryon-dense region, much denser than the highest baryon density attained at the AGS or SPS, will provide important information for the understanding of a Deconfined Quark Matter (DQM) state at relatively low temperatures, with different properties from those expected in the higher temperature baryon-free region around mid-rapidity, thought to exist in the core of neutron stars. -
Detection of Cosmic Rays at the LHC Detection of Cosmic Rays at the LHC
Particle and Astroparticle Physics at the Large Hadron Collider --Hadronic Interactions-- Albert De Roeck CERN, Geneva, Switzerland Antwerp University Belgium UC-Davis California USA NTU, Singapore November 15th 2019 Outline • Introduction on the LHC and LHC physics program • LHC results for Astroparticle physics • Measurements of event characteristics at 13 TeV • Forward measurements • Cosmic ray measurements • LHC and light ions? • Summary The LHC Machine and Experiments MoEDAL LHCf FASER totem CM energy → Run-1: (2010-2012) 7/8 TeV Run-2: (2015-2018) 13 TeV -> Now 8 experiments Run-2 starts proton-proton Run-2 finished 24/10/18 6:00am 2018 2010-2012: Run-1 at 7/8 TeV CM energy Collected ~ 27 fb-1 2015-2018: Run-2 at 13 TeV CM Energy Collected ~ 140 fb-1 2021-2023/24 : Run-3 Expect ⇨ 14 TeV CM Energy and ~ 200/300 fb-1 The LHC is also a Heavy Ion Collider ALICE Data taking during the HI run • All experiments take AA or pA data (except TOTEM) Expected for Run-3: in addition short pO and OO runs ⇨ pO certainly of interest for Cosmic Ray Physics Community! 4 10 years of LHC Operation • LHC: 7 TeV in March 2010 ->The highest energy in the lab! • LHC @ 13 TeV from 2015 onwards March 30 2010 …waiting.. • Most important highlight so far: …since 4:00 am The discovery of a Higgs boson • Many results on Standard Model process measurements, QCD and particle production, top-physics, b-physics, heavy ion physics, searches, Higgs physics • Waiting for the next discovery… -> Searches beyond the Standard Model 12:58 7 TeV collisions!!! New Physics Hunters -
Laboratori Nazionali Di Frascati
International Committee for Future Accelerators Sponsored by the Particles and Fields Commission of IUPAP Beam Dynamics Newsletter No. 51 Issue Editor: S. Chattopadhyay Editor in Chief: W. Chou April 2010 3 Contents 1 FOREWORD ........................................................................................................ 11 1.1 FROM THE CHAIRMAN ............................................................................................. 11 1.2 FROM THE EDITOR .................................................................................................. 12 2 INTERNATIONAL LINEAR COLLIDER (ILC) ............................................ 14 2.1 FIFTH INTERNATIONAL ACCELERATOR SCHOOL FOR LINEAR COLLIDERS ............... 14 3 THEME SECTION: ACCELERATOR SCIENCE AND TECHNOLOGY IN THE UK ................................................................................................................ 20 3.1 OVERVIEW – AN EMERGING PARADIGM OF COLLABORATION BETWEEN UNIVERSITIES, NATIONAL FACILITIES AND INDUSTRY ............................................ 20 3.1.1 Introduction .................................................................................................. 20 3.1.2 Mission of UK Accelerator Science and Technology .................................. 20 3.1.3 The Model: Integrated Accelerator Community and Stakeholders .............. 21 3.1.4 The Research Program Driven by Science ................................................... 21 3.1.4.1 Research Focus: Current .............................................................. -
Sub Atomic Particles and Phy 009 Sub Atomic Particles and Developments in Cern Developments in Cern
1) Mahantesh L Chikkadesai 2) Ramakrishna R Pujari [email protected] [email protected] Mobile no: +919480780580 Mobile no: +917411812551 Phy 009 Sub atomic particles and Phy 009 Sub atomic particles and developments in cern developments in cern Electrical and Electronics Electrical and Electronics KLS’s Vishwanathrao deshpande rural KLS’s Vishwanathrao deshpande rural institute of technology institute of technology Haliyal, Uttar Kannada Haliyal, Uttar Kannada SUB ATOMIC PARTICLES AND DEVELOPMENTS IN CERN Abstract-This paper reviews past and present cosmic rays. Anderson discovered their existence; developments of sub atomic particles in CERN. It High-energy subato mic particles in the form gives the information of sub atomic particles and of cosmic rays continually rain down on the Earth’s deals with basic concepts of particle physics, atmosphere from outer space. classification and characteristics of them. Sub atomic More-unusual subatomic particles —such as particles also called elementary particle, any of various self-contained units of matter or energy that the positron, the antimatter counterpart of the are the fundamental constituents of all matter. All of electron—have been detected and characterized the known matter in the universe today is made up of in cosmic-ray interactions in the Earth’s elementary particles (quarks and leptons), held atmosphere. together by fundamental forces which are Quarks and electrons are some of the elementary represente d by the exchange of particles known as particles we study at CERN and in other gauge bosons. Standard model is the theory that laboratories. But physicists have found more of describes the role of these fundamental particles and these elementary particles in various experiments. -
CASTOR: the ALICE Forward Detector for Identification of Centauros And
CASTOR: A FORWARD DETECTOR FOR THE IDENTIFICATION OF CENTAURO AND STRANGELETS IN NUCLEUS–NUCLEUS COLLISIONS AT THE LHC ∗ A.L.S. ANGELISa, J. BARTKEb, M.YU. BOGOLYUBSKYc, S.N. FILIPPOVd, E. GLADYSZ-DZIADU S´b, YU.V. KHARLOVc, A.B. KUREPINd, A.I. MAEVSKAYAd, G. MAVROMANOLAKISa, A.D. PANAGIOTOUa, S.A. SADOVSKYc, P. STEFANSKIb, Z. WLODARCZYK e aNuclear and Particle Physics Division, University of Athens, Hellas. bInstitute of Nuclear Physics, Cracow, Poland. cInstitute for High Energy Physics, Protvino, Russia. dInstitute for Nuclear Research, Moscow, Russia. eInstitute of Physics, Pedagogical University, Kielce, Poland. The physics motivation for a very forward detector to be employed in heavy ion collisions at the CERN LHC is discussed. A phenomenological model describing the formation and decay of a Centauro fireball in nucleus-nucleus collisions is presented. The CASTOR detector which is aimed to measure the hadronic and photonic content of an interaction and to identify deeply penetrating objects in the very forward, baryon-rich phase space 5.6 ≤ η ≤ 7.2 in an event-by-event mode is described. Results of simulations of the expected response of the calorimeter, and in particular to the passage of strangelets, are presented. 1 Introduction The ALICE detector 1, which is aimed at investigating nucleus–nucleus col- lisions at the LHC, will be fully instrumented for hadron and photon identi- fication only in the limited angular region around mid-rapidity, covering the pseudorapidity interval η 1. An additional muon detector 2 will be in- stalled on one side and will| | cover ≤ the pseudorapidity interval 2.5 η 4.0. -
Particle Accelerators and Experiments Albert De Roeck CERN, Geneva, Switzerland Antwerp University Belgium UC-Davis California USA NTU, Singapore
Particle Accelerators and Experiments Albert De Roeck CERN, Geneva, Switzerland Antwerp University Belgium UC-Davis California USA NTU, Singapore March 30th- April 2nd Muscat 1 Part I Accelerators 2 Different types of Methodology tools and equipment are needed to observe different sizes of object Only particle accelerators can explore the tiniest objects in the 5 Universe 5 Accelerators are Powerful Microscopes Planck constant They make high energy particle beams h = momentum that allow us to see small things. wavelength p ~ energy seen by low energy seen by high energy beam of particles beam of particles (poorer resolution) (better resolution) High Energy Physics Experiments Rutherford experiment (1909) Centre of mass energy squared s=E1m2 Centre of mass energy squared s=4E1E2 Detectors techniques have followed these developments Accelerators for Charged Particles 9 Recent High Energy Colliders Highest energies can be reached with proton colliders Machine Year Beams Energy (s) Luminosity SPPS (CERN) 1981 pp 630-900 GeV 6.1030cm-2s-1 Tevatron (FNAL) 1987 pp 1800-2000 GeV 1031-1032cm-2s-1 SLC (SLAC) 1989 e+e- 90 GeV 1030cm-2s-1 LEP (CERN) 1989 e+e- 90-200 GeV 1031-1032cm-2s-1 HERA (DESY) 1992 ep 300 GeV 1031-1032cm-2s-1 RHIC (BNL) 2000 pp /AA 200-500 GeV 1032cm-2s-1 LHC (CERN) 2009 pp (AA) 7-14 TeV 1033-1034cm-2s-1 Luminosity = number of events/cross section/sec • Limits on circular machines – Proton colliders: Dipole magnet strength superconducting magnets – Electron colliders: Synchrotron10 radiation/RF power: loss ~E4/R2 How Many Accelerators Worldwide? a) 1-10 b) 10-100 c) 100-1,000 d) 1,000-10,000 e) > 10,000 11 Accelerators Worldwide > 25,000 accelerators in use 12 Accelerators Worldwide 44% Radio- therapy 13 Accelerators Worldwide 44% 40% Radio- Ion therapy implant. -
Arxiv:1405.7662V4 [Hep-Ph] 28 Aug 2014
THE PHYSICS PROGRAMME OF THE MoEDAL EXPERIMENT AT THE LHC B. ACHARYA1;2; J. ALEXANDRE1, J. BERNABEU´ 3, M. CAMPBELL4, S. CECCHINI5, J. CHWASTOWSKI6, M. DE MONTIGNY7, D. DERENDARZ6, A. DE ROECK4, J. R. ELLIS1;4, M. FAIRBAIRN1, D. FELEA8, M. FRANK9, D. FREKERS10, C. GARCIA3, G. GIACOMELLI5;5ay, J. JAKUBEK˚ 11, A. KATRE12, D-W KIM13, M.G.L. KING3, K. KINOSHITA14, D. LACARRERE4, S. C. LEE11, C. LEROY15, A. MARGIOTTA5, N. MAURI5;5a, N. E. MAVROMATOS1;4, P. MERMOD12, V. A. MITSOU3, R. ORAVA16, L. PASQUALINI5;5a, L. PATRIZII5, G. E. PAV˘ ALAS¸˘ 8, J. L. PINFOLD7∗, M. PLATKEVICˇ 11, V. POPA8, M. POZZATO5, S. POSPISIL11, A. RAJANTIE17, Z. SAHNOUN5;5b, M. SAKELLARIADOU1, S. SARKAR1, G. SEMENOFF18, G. SIRRI5, K. SLIWA19, R. SOLUK7, M. SPURIO5;5a, Y.N. SRIVASTAVA20, R. STASZEWSKI6, J. SWAIN20, M. TENTI5;5a, V. TOGO5, M. TRZEBINSKI6, J. A. TUSZYNSKI´ 7, V. VENTO3, O. VIVES3, Z. VYKYDAL11, and A. WIDOM20, J. H. YOON21. (for the MoEDAL Collaboration) 1Theoretical Particle Physics and Cosmology Group, Physics Department, King's College London, UK 2International Centre for Theoretical Physics, Trieste, Italy 3IFIC, Universitat de Val`encia- CSIC, Valencia, Spain 4Physics Department, CERN, Geneva, Switzerland 5 INFN, Section of Bologna, 40127, Bologna , Italy 5a Department of Physics & Astronomy, University of Bologna, Italy 5b Centre on Astronomy, Astrophysics and Geophysics, Algiers, Algeria 6 Institute of Nuclear Physics Polish Academy of Sciences, Cracow, Poland 7Physics Department, University of Alberta, Edmonton Alberta, Canada 8Institute of Space -
The Very Forward CASTOR Calorimeter of the CMS Experiment
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH (CERN) CERN-EP-2020-180 2021/02/11 CMS-PRF-18-002 The very forward CASTOR calorimeter of the CMS experiment The CMS Collaboration* Abstract The physics motivation, detector design, triggers, calibration, alignment, simulation, and overall performance of the very forward CASTOR calorimeter of the CMS exper- iment are reviewed. The CASTOR Cherenkov sampling calorimeter is located very close to the LHC beam line, at a radial distance of about 1 cm from the beam pipe, and at 14.4 m from the CMS interaction point, covering the pseudorapidity range of −6.6 < h < −5.2. It was designed to withstand high ambient radiation and strong magnetic fields. The performance of the detector in measurements of forward energy density, jets, and processes characterized by rapidity gaps, is reviewed using data collected in proton and nuclear collisions at the LHC. ”Published in the Journal of Instrumentation as doi:10.1088/1748-0221/16/02/P02010.” arXiv:2011.01185v2 [physics.ins-det] 10 Feb 2021 © 2021 CERN for the benefit of the CMS Collaboration. CC-BY-4.0 license *See Appendix A for the list of collaboration members Contents 1 Contents 1 Introduction . .1 2 Physics motivation . .3 2.1 Forward physics in proton-proton collisions . .3 2.2 Ultrahigh-energy cosmic ray air showers . .5 2.3 Proton-nucleus and nucleus-nucleus collisions . .5 3 Detector design . .6 4 Triggers and operation . .9 5 Event reconstruction and calibration . 12 5.1 Noise and baseline . 13 5.2 Gain correction factors . 15 5.3 Channel-by-channel intercalibration . -
Centauro and Strange Object Research in Nucleus
View metadata, citation and similar papers at core.ac.uk brought to you by CORE CASTOR: Centauro And Strange Object Research in provided by CERN Document Server nucleus-nucleus collisions at LHC Ewa G ladysz-Dziadu´s for the CASTOR group A L S Angelis1, X Aslanoglou2,JBartke3, K Chileev4, 3 4 4 4 EG ladysz-Dziadu´s ∗,MGolubeva,FGuber,TKaravitcheva, YVKharlov5,ABKurepin4, G Mavromanolakis1, A D Panagiotou1, S A Sadovsky5 VVTiflov4, and Z Wlodarczyk 6 1 Nuclear and Particle Physics Division, University of Athens, Athens, Greece. 2 Department of Physics, the University of Ioannina, Ioannina, Greece. 3 Institute of Nuclear Physics, Cracow, Poland. 4 Institute for Nuclear Research, Moscow, Russia. 5 Institute for High Energy Physics, Protvino, Russia. 6 Institute of Physics, Pedagogical University, Kielce, Poland. Abstract. We describe the CASTOR detector designed to probe the very forward, baryon-rich rapidity region in nucleus-nucleus collisions at the LHC. We present a phenomenological model describing the formation of a QGP fireball in high baryochemical potential environment, and its subsequent decay into baryons and possibly strangelets. The model explains the Centauro events observed in cosmic rays and the long-penetrating component frequently accompanying them, and makes predictions for the LHC. Simulations of Centauro-type events by means of our Monte-Carlo event generator CNGEN were done. To study the response of the apparatus to new effects, different exotic species (DCC clusters, Centauros, strangelets and so{called mixed events produced by baryons and strangelets being the remnants of the Centauro fireball explosion) were passed through the deep calorimeter. The energy deposition pattern in the calorimeter appears to be a new clear signature of the QGP state. -
Search for New Physics in Same-Sign Dilepton Channel Using 35 Pb-1 of the CMS Data
CERN-THESIS-2011-276 SHARIF UNIVERSITY OF TECHNOLOGY PHYSICS DEPARTMENT Ph.D. Thesis Search for new physics in same-sign dilepton channel 1 using 35 pb− of the CMS data By: Hamed BAKHSHIANSOHI Supervisor: Professor Farhad ARDALAN Co-Supervisor: Professor Luc PAPE October 2011 Contents Contents Contentsa Acknowledgementj Introductionk 1 Standard Model and Supersymmetry1 1.1 The Standard Model and Gauge symmetries . .1 1.1.1 Spontaneous Symmetry Breaking and the Higgs mechanism . .3 1.1.2 Shortcomings of the Standard Model . .5 1.2 Supersymmetry . .8 1.2.1 How SUSY solves the problems of Standard Model . 10 1.3 The MSSM . 12 1.3.1 Supersymmetric Lagrangians . 12 1.3.2 The Minimal Supersymmetric Standard Model . 14 1.3.3 Supersymmetry Breaking . 16 1.3.4 Spontaneous Symmetry Breaking . 17 1.3.5 Minimal gravity mediated super symmetry breaking (mSUGRA) 19 2 The Large Hadron Collider (LHC) 22 2.1 Colliders in general . 22 2.1.1 LEP . 24 2.1.2 Tevatron . 25 2.2 LHC . 27 2.2.1 Motivations for LHC . 27 2.2.2 2008 incident . 30 2.2.3 2010 Data taking . 30 3 The Compact Muon Solenoid (CMS) experiment 34 3.1 The tracker . 38 3.1.1 Pixel detectors . 38 3.1.2 Silicon microstrip detectors . 41 3.1.3 Commissioning and performance with data . 42 3.2 The electromagnetic calorimeter (ECal) . 44 a Contents 3.2.1 Commissioning and performance with 2010 data . 45 3.2.2 Anomalous Energy Deposits (Spikes) . 46 3.3 The hadronic calorimeter (HCal) . 48 3.3.1 Commissioning and performance .