Barry Jay BLUMENFELD Professor of Physics
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ISABELLE DESIGN Studyk
© 1973 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. ISABELLE DESIGN STUDYk F. E. Mills Brookhaven National Laboratory Upton, New York Introduction Intersection Regions Following the 1970 BNL Summer Study on AGS Utili- The philosophy of design of the intersection re- zation, John Blewett and I began to consider the design gions is to remove the momentum dispersion, allow the of colliding beam systems in the center of mass energy beam to spread in size, to pass it through a strong range from 200 GeV to 2000 GeV, since it seemed to us lens and bring it to a small focus at the intersection then that significant new phenomena could be expected region (low p). The process is then reversed to return in nuclear interactions in that energy range. We took it to the normal lattice. In some cases (elastic as initial conditions, that we would employ the emer- scattering), the beam is kept large, to obtain good gent technology of superconducting magnets, and that angular resolution. What we have done is to design a we would employ the AGS as the injector, hence requir- "catalog" of intersecting regions, in cooperation with ing the acceleration of the full stored beam to final experimentalists, to fit the needs of particular exper- energies in the storage device. In the summer of 1971, iments. -
A Pp and E+E- Collider in a 100Km Ring at Fermilab
A pp and e+e- collider in a 100km ring at Fermilab Tanaji Sen In collaboration with C.M.Bhat, P.C. Bhat, W. Chou, E. Gianfelice-Wendt, J. Lykken, M.K. Medina, G.L. Sabbi, R. Talman 5th TLEP Workshop July 25-26, 2013 Fermilab Outline Motivation • Snowmass study • TLEP design study in a 80 km ring • Past studies of VLHC and VLLC in a 233 km ring in 2001 • Now a “more modest” ring of circumference = 100 km • Design of a pp collider with 100 TeV CM energy • Design of an e+e- collider with 240-350 GeV CM energy • No discussion of - Cost - Politics of acquiring 100 km of real estate T. Sen pp and e+e- colliders 2 Hadron Colliders - Wikipedia Hadron colliders Intersecting Storage Rings CERN, 1971–1984 Super Proton Synchrotron CERN, 1981–1984 ISABELLE BNL, cancelled in 1983 Tevatron Fermilab, 1987–2011 Relativistic Heavy Ion Collider BNL, 2000–present Superconducting Super Collider Cancelled in 1993 Large Hadron Collider CERN, 2009–present High Luminosity Large Hadron Proposed, CERN, 2020– Collider Very Large Hadron Collider Theoretical T. Sen pp and e+e- colliders 3 Hadron Colliders ISR SPS Tevatron RHIC (pp) LHC (2012) Circumference [km] 0.94 6.9 6.3 3.8 26.7 Energy [GeV] 31 315 980 255 4000 Number of bunches dc 6 36 107 1380 Bunch spacing [ns] - 1150 396 108 50 Bunch intensity [x1011 ] - 2.75 (3.1/1 ) 2.0 1.7 Particles/beam [x 1014] 9.8 7.8/4.2 112/36 143 3089 Trans. rms Emitt [ μm] 1.5/0.15 (3/1.5) 3.3 2.5 Beam-beam tune shift 0.0035x8 0.005x3 0.013x2 0.007x2 0.01x2 Luminosity [x1032 cm-2s-1] 1.3 0.06 4.0 2.3 77 # of events/crossing 12 37 Stored beam energy [MJ] 0.005 0.04 1.75/0.57 0.57 140 T. -
SCOPE of the WORKSHOP D. Cline Fermi National
SCOPE OF THE WORKSHOP D. Cline Fermi National Accelerator Laboratory and University of Wisconsin at Madison A Workshop was held during the week of March 1. The very interesting talk of R. Feynman on 27-31 at the Lawrence Berkeley Laboratory in ultra high energy interactions (Ua) and the historical Berkeley, California. The purpose of the Workshop surveys of beam cooling by A. Sessler and was to discuss various beam-cooling techniques and to R. R. Wilson. investigate the possibility of constructing high luminosity proton-antiproton storage rings. 2. The general conviction that pp machines pro Herman Grunder and other members of the LBL staff posed in the present CERN and Fermilab schemes are were largely responsible for the efficient operation of sound (UIc, d; IVc; Vb). the Workshop and the success. The Workshop was jointly sponsored by Fermilab and LBL. 3. The discussion of the cooling of high energy That this was the first workshop totally devoted proton-antiproton beams by electrons (Rubbia, Month, to beam cooling and to high luminosity pp storage rings Ruggiero) or by synchrotron radiation (Wilson). The indicates the close coupling between the two subjects. report of Ruggiero, Vh, was completed after the The construction of pp storage rings is an old dream Workshop and is reproduced here for completeness. of accelerator physicists, the practical realization of these machines certainly relies on beam-cooling tech 4. The understanding of improvements in target niques. The late G. Budker often discussed the possi efficiency that can raise the p yield by a considerable bility of pp storage rings and realized that beam factor (IVd). -
Strange Hadrocharmonium ∗ M.B
Physics Letters B 798 (2019) 135022 Contents lists available at ScienceDirect Physics Letters B www.elsevier.com/locate/physletb Strange hadrocharmonium ∗ M.B. Voloshin a,b,c, a William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, MN 55455, USA b School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA c Institute of Theoretical and Experimental Physics, Moscow, 117218, Russia a r t i c l e i n f o a b s t r a c t Article history: It has been recently suggested that the charged charmoniumlike resonances Zc (4100) and Zc (4200) Received 23 May 2019 are two states of hadrocharmonium, related by the charm quark spin symmetry in the same way Received in revised form 12 August 2019 as the lowest charmonium states ηc and J/ψ. It is pointed out here that in this picture one might Accepted 16 September 2019 expect existence of their somewhat heavier strange counterparts, Zcs, decaying to ηc K and J/ψ K . Some Available online 11 October 2019 expected properties of such charmoniumlike strange resonances are discussed that set benchmarks for Editor: B. Grinstein their search in the decays of the strange Bs mesons. © 2019 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license 3 (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP . Numerous new resonances recently uncovered near the open down to about 4220 MeV), has been recently invoked [11]for de- charm and open bottom thresholds, the so-called XYZ states, ap- scription of the charged charmoniumlike resonances Zc(4100) and parently do not fit in the standard quark-antiquark template and Zc(4200) observed respectively in the decay channels ηcπ [12] 1 contain light constituents in addition to a heavy quark-antiquark and J/ψπ [13]. -
Minimal Flavour Violation in a Custodial Two Higgs Doublet Model
Universit´ecatholique de Louvain Secteur des sciences et technologies Institut de recherche en math´ematique et physique Centre for Cosmology, Particle Physics and Phenomenology Minimal Flavour Violation in a custodial Two Higgs Doublet Model Doctoral dissertation presented by Elvira Cerver´oGarc´ıa in fulfilment of the requirements for the degree of Doctor in Sciences Jury Prof. Vincent Lemaˆıtre (chairman) UCL, Belgium Prof. Jean-Marc G´erard (advisor) UCL, Belgium Prof. Fabio Maltoni UCL, Belgium Prof. Christophe Delaere UCL, Belgium Prof. Michel Tytgat ULB, Belgium Prof. Christopher Smith Universit´eGrenoble Alpes, France July 2017 ”Everything comes gradually and at its appointed hour” Ovid I would like to thank my advisor, Professor Jean-Marc G´erard, for giving me the opportunity of carrying out and achieving this work. His passion and en- thusiasm have encouraged me to deepen in the understanding of nature through scientific research. I also want to thank all the members of my jury, Professors Vincent Lemaˆıtre, Fabio Maltoni, Christophe Delaere, Michel Tytgat and Christopher Smith. I am honoured that they have taken the time to assess this work and contribute to its improvement with their relevant questions and remarks. My gratitude extends to the numerous professors, fellow PhD students and stu- dents that have in one way or another influenced my learning since I arrived to this univerity already twelve years ago. I am unable to name each and everyone of them, but I can only say thank you for helping me to become a physicist and making me always feel at home. I cannot finish without thanking all the people around me that have brought this project to completion. -
1) Direct Top-Quark Decay Width Measurement in the $T\Bar{T}
Publications of Ian Shipsey (September, 2017) 1) Direct top-quark decay width measurement in the $t\bar{t}$ lepton+jets channel at $\sqrt{s}=8 \rm{TeV}$ with the ATLAS experiment By ATLAS Collaboration (Morad Aaboud et al.). arXiv:1709.04207 [hep-ex]. Submitted to Eur. Phys. J. C. 2) Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at $\sqrt{s}$=13 TeV with the ATLAS detector By ATLAS Collaboration (Morad Aaboud et al.). arXiv:1709.04183 [hep-ex]. Submitted to JHEP. 3) Measurement of $\tau$ polarisation in $Z/\gamma^{*}\rightarrow\tau\tau$ decays in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector By ATLAS Collaboration (Morad Aaboud et al.). arXiv:1709.03490 [hep-ex]. Submitted to Eur. Phys. J. C. 3a) An Electro - Optical Test System for Optimising Operating Conditions of CCD sensors for LSST D.P. Weatherill, R. Plackett, K. Arndt and I.P.J. Shipsey To appear in JINST 2017. 4) Measurement of quarkonium production in proton--lead and proton--proton collisions at $5.02$ $\mathrm{TeV}$ with the ATLAS detector By ATLAS Collaboration (Morad Aaboud et al.). arXiv:1709.03089 [nucl-ex]. Submitted to Eur. Phys. J. C. 4a) Characterisation of the Medipix3 detector for 60 and 80 keV electrons By J.A. Mir et al.. To appear in Ultramicroscopy Vol. 182 November 2017, Pages 44-53 http://www.sciencedirect.com/science/article/pii/S0304399116303989 5) Measurement of longitudinal flow de-correlations in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ and 5.02 TeV with the ATLAS detector By ATLAS Collaboration (Morad Aaboud et al.). -
People and Things
People and things On people Among the awards distributed at the recent joint annual meeting of the American Physical Society and the American Association of Phy sics Teachers were the Dannie Heineman Prize for Mathematical Physics, to John C. Ward of Mac- quarie University, Australia, for his contributions to the development of particle gauge theories, and the Oersted Medal for physics teach ing, to 1.1. Rabi of Columbia Univer sity. LEP people Now that the LEP electron-positron collider project is under way at CERN, decisions have been taken on the management of the machine construction and on preparations for the experimental programme. At CERN itself, a LEP Manage ment Board has been set up to sending institution. We have advised One of the international discussion panels study and propose solutions to at the Pan American Symposium on High and encouraged the first user group Energy Physics and Technology, held at major problems of the construction from Mexico. We are seeking mod Cocoyoc, Mexico, in January. Left to right, programme and to share respon est Foundation and International R. Taylor from SLAC (representing Canada), sibility for major decisions concern Fermilab Director Leon Lederman Agency support in order to minimize (representing the US), J. Flores of Mexico, ing the project. The members of the problems of government involve M. Kreisler of the US, C Avilez of Mexico, the Board (appointed for two ment. Agreements between institu and Burt Richter also from SLAC, years) are E. Picasso (Chairman), representing the US. tions are simple to administer and G. Plass, H. Laporte. -
Deliberation Document on the 2020 Update European Strategy
DELIBERATION DOCUMENT ON THE 2020 UPDATE OF THE EUROPEAN STRATEGY FOR PARTICLE PHYSICS The European Strategy Group _Preface The first European Strategy for Particle Physics (hereinafter referred to as “the Strategy”), consisting of seventeen Strategy statements, was adopted by the CERN Council at its special session in Lisbon in July 2006. A first update of the Strategy was adopted by the CERN Council at its special session in Brussels in May 2013. This second update of the Strategy was formulated by the European Strategy Group (ESG) (Annex 1) during its six-day meeting in Bad Honnef in January 2020. The resolution on the 2020 Update of the European Strategy for Particle Physics was adopted at the 199th Session of the CERN Council on 19 June 2020. The ESG was assisted by the Physics Preparatory Group (Annex 2), which had provided scientific input based on the material presented at a four-day Open Symposium held in Granada in May 2019, and on documents submitted by the community worldwide. In addition, six working groups (Annex 3) were set up within the ESG to address the following points: Social and career aspects for the next generation; Issues related to Global Projects hosted by CERN or funded through CERN outside Europe; Relations with other groups and organisations; Knowledge and Technology Transfer; Public engagement, Education and Communication; Sustainability and Environmental impact. Their conclusions were discussed at the Bad Honnef meeting. This Deliberation Document was prepared by the Strategy Secretariat. It provides background information underpinning the Strategy statements. Recommendations to the CERN Council made by the Working Groups for possible modifications to certain organisational matters are also given. -
Toward the Limits of Matter: Ultra-Relativistic Nuclear Collisions at CERN
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN-OPEN-To be specified 21 May 2015 Toward the Limits of Matter: Ultra-relativistic nuclear collisions at CERN Abstract Strongly interacting matter as described by the thermodynamics of QCD undergoes a phase transi- tion, from a low temperature hadronic medium to a high temperature quark-gluon plasma state. In the early universe this transition occurred during the early microsecond era. It can be investigated in the laboratory, in collisions of nuclei at relativistic energy, which create ”fireballs” of sufficient energy density to cross the QCD Phase boundary. We describe 3 decades of work at CERN, devoted to the study of the QCD plasma and the phase transition. From modest beginnings at the SPS, ultra- relativistic heavy ion physics has evolved today into a central pillar of contemporary nuclear physics and forms a significant part of the LHC program. Jurgen¨ Schukraft PH Division, CERN, CH-1211 Geneva 23, Switzerland Reinhard Stock Institute of Nuclear Physics, and FIAS, Max von Laue Strasse 1, D-60438 Frankfurt/Main, Germany arXiv:1505.06853v1 [nucl-ex] 26 May 2015 To appear in “60 Years of CERN Experiments and Discoveries”, Editors H. Schopper and L. di Lella, World Scientific Publishing, Singapore, 2015 Toward the Limits of Matter: Ultra-relativistic nuclear collisions at CERN 1 1 Strongly interacting matter We recall here the development of a novel research field at CERN, devoted to the phases and phase structure of matter governed by the strong fundamental force. Its proper field theory was discovered around 1970: Quantum Chromodynamics (QCD) addresses the fundamental interactions of elementary quarks, as mediated by gluons. -
James W. Rohlf Feb
James W. Rohlf Feb. 2017 Contact Boston University Physics Dept., 590 Commonwealth Ave., Boston, MA 02215, phone 617-353-2600, mobile 617-543-7455, Skype 617-275-3636, CERN +41754112573 email [email protected] Education Ph.D. in Physics 1980 Caltech, ”Investigations of Hadron Jets,” published in Nucl. Phys. B171 (1980) p. 1-37, Committee: G. C. Fox (advisor), C. Barnes, R. P. Feynman, R. Gomez M.S. in Physics 1975 University California, Los Angeles B.A. Physics and B.S. Mathematics 1973 University of Minnesota Employment Professor of Physics, Boston University, 1988 - present Associate Professor of Physics, Harvard University, 1985-8 Assistant Professor of Physics, Harvard University, 1981-5 (concurrent with Cornell and CERN) Scientific Associate (paid), European Center for Nuclear Research (CERN), 1982-4 Visiting Fellow, Laboratory of Nuclear Studies, Cornell University, 1980-2 Research Associate, Harvard University, 1980-1 Research Associate, California Institute of Technology, 1979-80 Current research Physics with the Compact Muon Solenoid (CMS) detector at the CERN LHC. First data col- lected in Dec. 2009. First physics paper published in Feb. 2010. Design and construction of the data concentrator (DCC and DCC2) to read out the CMS hadron calorimeter (HCAL) and other associated electronics ($5 M equipment money). Development of silicon photomultipliers (SiPM) and micro-CTA electronics (AMC13) for trigger, clock, and data acquisition in CMS. Led effort to establish source calibration procedure for calorimeter. Supervision of postdocs and and gradu- ate students. Work closely with the senior engineers at the Boston University Electronics Design Facility. Operations and detctor upgrades funded by US Department of Energy. -
Measurement of B Meson Production Cross-Sections in Proton-Proton
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH (CERN) CERN-PH-EP-2013-095 LHCb-PAPER-2013-004 Oct. 1, 2013 Measurement of B meson production cross-sections inp proton-proton collisions at s = 7 TeV The LHCb collaborationy Abstract The production cross-sections of B mesons are measured in pp collisions at a centre-of- mass energy of 7 TeV, using data collected with the LHCb detector corresponding to −1 + 0 0 a integrated luminosity of 0:36 fb . The B , B and Bs mesons are reconstructed + + 0 ∗0 0 in the exclusive decays B ! J= K , B ! J= K and Bs ! J= φ, with J= ! µ+µ−, K∗0 ! K+π− and φ ! K+K−. The differential cross-sections are measured as functions of B meson transverse momentum pT and rapidity y, in the range 0 < pT < 40 GeV=c and 2:0 < y < 4:5. The integrated cross-sections in the same pT and y ranges, including charge-conjugate states, are measured to be σ(pp ! B+ + X) = 38:9 ± 0:3 (stat:) ± 2:5 (syst:) ± 1:3 (norm:) µb; σ(pp ! B0 + X) = 38:1 ± 0:6 (stat:) ± 3:7 (syst:) ± 4:7 (norm:) µb; 0 σ(pp ! Bs + X) = 10:5 ± 0:2 (stat:) ± 0:8 (syst:) ± 1:0 (norm:) µb; arXiv:1306.3663v2 [hep-ex] 1 Oct 2013 where the third uncertainty arises from the pre-existing branching fraction measure- ments. Submitted to JHEP c CERN on behalf of the LHCb collaboration, license CC-BY-3.0. yAuthors are listed on the following pages. ii LHCb collaboration R. -
RCED-91-116 Federal Research: Status of DOE's Superconducting
._ * United States General Accounting Office -,_ Report to the Chairman, Committee on GAO the Budget, U.S. Senate April 1991 FEDERAL RESEARCH Status of DOE’s Superconducting Super Collider GAO,‘RCED-91-116 United States General Accounting Office GAO Washington, D.C. 20548 Resources, Community, and Economic Development Division B-227295.8 April 151991 The Honorable Jim Sasser Chairman, Committee on the Budget United States Senate Dear Mr. Chairman: In response to your March 7,1990, request we reviewed the status of the Department of Energy’s (DOE) Superconducting Super Collider (ssc), which will be located 30 miles south of Dallas, Texas. The ssc will be the world’s largest high energy particle accelerator-a research tool used by physicists to seek fundamental knowledge about energy and matter. DOE recently estimated that the ssc will cost $8.2 billion (in current-year dol- lars).’ You expressed concern that once the project progressed beyond the design phase, other problems could lead to further cost increases. As agreed with your office, this report provides information on the insta- bility in tenure of DOE and ssc Laboratory project management, uncer- tainties related to the ssc site geology, uncertainties and risks with magnet development and production, and Texas’ proposed contribution to the project’s costs. Both the ssc Laboratory and DOE’S ssc program office have experienced Results in Brief management instability because acting directors that have occupied key positions have frequently changed. In general, instability in key leader- ship positions can result in frequent changes of direction, diminished accountability, and little long-term operational planning.