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First years of data taking with the CMS experiment at the LHC

English title First years of data taking with the CMS experiment at the LHC
Applicant Dissertori Günther
Number 128079
Funding scheme SCOPES
Research institution Institut für Teilchen- und Astrophysik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Particle Physics
Start/End 01.11.2009 - 31.10.2012
Approved amount 240'000.00
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Keywords (8)

Standard Model; Search for the Higgs Boson; Particle Production; LHC Large Hadron Collider; CMS Detector; Electromagnetic Calorimeter; Muon Detectors; Alignment

Lay Summary (English)

Lead
Lay summary
The Institute for Particle Physics (IPP) of ETH Zurich is one of the leading Institutes participating in the Compact Muon Solenoid (CMS) experiment at CERN's Large Hadron Collider (LHC). The design concept of the CMS experiment guarantees full exploitation of the physics potential offered by the LHC, which will provide proton-proton collisions at unprecedented centre-of-mass energies. CMS has thus a unique prospective for important discoveries in Particle Physics for the next decade. Two of the most important detector systems of the CMS experiment are the high precision Electromagnetic Calorimeter (ECAL), and the muon spectrometer. These systems are crucial for a large spectrum of measurements and their good performance is essential for the success of the CMS experiment. From the very beginning the IPP had major responsibility of scientific, technical and managerial nature for this ECAL subdetector. In particular, we carry the project leadership for the development, construction and operation of the Detector Control System (DCS) of ECAL. This project is realized in collaboration with scientists from the VINCA Institute and the Faculty of Physics of the University of Belgrade (Serbia). Similarly, Hungarian Institutes from Budapest and Debrecen have taken important responsibilities for the alignment system of the muon spectrometer. This proposal for a Joint Research Project (JRP) is intended to strengthen the already existing and very successful collaboration with our colleagues from Serbia. At the same time, we would like to extend this JRP to our colleagues from the Hungarian institutes and thus form a strong and competitive cluster of institutes within the large CMS collaboration. The objectives and expected results of the proposed JRP can be summarized as follows:?- Allow for prolonged stays of members from the Serbian and Hungarian research teams at CERN in order to carry out the following research activities:?o Operation and maintenance of the CMS ECAL safety system and the muon alignment system?o Participation in the final commissioning of the CMS detector and the start-up physics run?o Setting up and participation in physics analyses of LHC data, which concentrate on the exploitation of the excellent capabilities of the CMS sub-detectors. ?o Support of the data analysis activities in terms of theoretical contributions. ?- These activities should result in?o Highly efficient and safe operation of the CMS ECAL and precise muon track reconstruction thanks to an optimally aligned muon system?o An in-depth understanding of the first CMS data?o First Physics results from the analyses of the data collected during the initial years of LHC running.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Publications

Publication
A simple energy loss model and its applications for silicon detectors
F. Siklér (2012), A simple energy loss model and its applications for silicon detectors, in Nucl. Instrum. Meth A, 691 (2012) 1, 16-29.
Optimized estimation of energy loss rate for charged particles from energy deposit measurements in tracking detectors
F. Siklér and S. Szeles (2012), Optimized estimation of energy loss rate for charged particles from energy deposit measurements in tracking detectors, in Nucl. Instrum. Meth., A687 (2012) 30-39, 30-39.
CMS Barrel Muon Alignment: Influence of Missing MABs on DT-positioning Accuracy,
G. Bencze N. Beni Z. Szillasi B. Ujvari (2012), CMS Barrel Muon Alignment: Influence of Missing MABs on DT-positioning Accuracy,, in CMS Note, 2012, 1-9.
“t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects”,
M.V. Garzelli A. Kardos C.G. Papadopoulos Z. Trócsányi (2012), “t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects”,, in JHEP, 1211 (2012) 056, 056.
Detailed characterization of jets in heavy ion collisions using jet shapes and jet fragmentation functions
CMS Collaboration (2012), Detailed characterization of jets in heavy ion collisions using jet shapes and jet fragmentation functions, CERN, Geneva.
Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
CMS Collaboration (2012), Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, in Phys.Lett. B, 716 (2012) 30, 1-59.
Study of the inclusive production of charged pions, kaons, and protons in pp collisions at √s = 0.9, 2.76, and 7 TeV,
CMS Collaboration (2012), Study of the inclusive production of charged pions, kaons, and protons in pp collisions at √s = 0.9, 2.76, and 7 TeV,, in European Physical Journal C, 72 (2012) 2164, 1-49.
First measurement of vector boson production associated with top-antitop pairs at 7 TeV”
CMS Collaboration (2012), First measurement of vector boson production associated with top-antitop pairs at 7 TeV”.
Maintaining and improving the control and safety systems for the Electromagnetic Calorimeter of the CMS experiment
P. Adzic et al. (2012), Maintaining and improving the control and safety systems for the Electromagnetic Calorimeter of the CMS experiment, in Journal of Physics: Conference Series, ICHEP12, contribution to ICHEP12,, contribution to ICHEP12,.
Study of high-pT charged particle suppression in PbPb compared to pp collisions at √sNN= 2.76 TeV,
CMS Collaboration (2012), Study of high-pT charged particle suppression in PbPb compared to pp collisions at √sNN= 2.76 TeV,, in Eur Phys J C, 72 (2012) 1945, 1-33.
“t tbar+X hadroproduction with PowHel“,
M.V. Garzelli A. Kardos and Z. Trócsányi (2012), “t tbar+X hadroproduction with PowHel“,, in PoS LL2012 (2012).
Top quark pair production in association with a jet with NLO parton showering
A. Kardos C. Papadopoulos Z. Trócsányi (2012), Top quark pair production in association with a jet with NLO parton showering, in Phys. Lett. B, 705((2011)), 76-81.
Computation of integrated subtraction terms numerically
G. Somogyi Z. Szőr and Z. Trócsányi (2012), Computation of integrated subtraction terms numerically, in contribution to the SM and NLO Multileg and SM MC Working Groups: Summary Report.
Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
CMS Collaboration (2012), Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV, in Phys. Lett B, 710 , 403-425.
“pp --> t tbar H: comparisons between POWHEG-HELAC and aMC@NLO“
R. Frederix M.V. Garzelli A. Kardos C.G. Papadopoulos and Z. Trócsányi (2012), “pp --> t tbar H: comparisons between POWHEG-HELAC and aMC@NLO“, in Handbook of LHC Higgs Cross Sections: 2. Differential Distributions,, (282), 282.
Measurement of Wgamma and Zgamma production in pp collisions at sqrt(s)=7 TeV
CMS Collaboration (2011), Measurement of Wgamma and Zgamma production in pp collisions at sqrt(s)=7 TeV, in Phys. Lett. B, 701 (2011) , 535-555.
"Charged hadron multiplicity and transverse energy densities in PbPb collisions from CMS",
K. Krajczar on behalf of the CMS Collaboration (2011), "Charged hadron multiplicity and transverse energy densities in PbPb collisions from CMS",, in iopscience.iop.org.
“Z0-boson production in association with a top anti-top pair at NLO accuracy with parton shower effects
M.V. Garzelli A. Kardos C.G. Papadopoulos Z. Trócsányi (2011), “Z0-boson production in association with a top anti-top pair at NLO accuracy with parton shower effects, in Phys. Rev. D85 (2012) , 85(074022), 1-10.
“ttbar+jet production at NLO matched with parton showering”.
Adam Kardos Costas Papadopoulos Zoltán Trócsányi (2011), “ttbar+jet production at NLO matched with parton showering”., in Phys.Lett.B, B705 (2011) (1-2), 76-81.
Top quark pair production in association with a Z-boson at NLO accuracy
A. Kardos Z. Trócsányi C. Papadopoulos (2011), Top quark pair production in association with a Z-boson at NLO accuracy, in Phys. Rev. D85, 85, 054015.
“POWHEG-HELAC: NLO ttbar production with parton showering”
Adam Kardos Costas Papadopoulos Zoltán Trócsányi “ (2011), “POWHEG-HELAC: NLO ttbar production with parton showering”, in Phys. Lett B. , 76-81.
Observation and studies of jet quenching in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV.
S. Chatrchyan et al. (2011), Observation and studies of jet quenching in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV., in Phys.Rev.C, 84(024906), 1-26.
Standard Model Higgs boson production in association with a top anti-top pair at NLO with parton showering
M.V. Garzelli A. Kardos C.G. Papadopoulos Z. Trócsányi (2011), Standard Model Higgs boson production in association with a top anti-top pair at NLO with parton showering, in Europhys. Lett , 96, 14-11001.
"Dependence on pseudorapidity and centrality of charged hadron production in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV",
CMS Collaboration (2011), "Dependence on pseudorapidity and centrality of charged hadron production in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV",, in JHEP, 08, 141.
NLO Event Samples for the LHC
M.V. Garzelli A. Kardos Z. Trócsányi (2011), NLO Event Samples for the LHC, in (EPS High Energy Physics Conference 2011, Grenoble.
“Strange Particle Production in pp collisions at sqrt(s) = 0.9 and 7 TeV
The CMS Collaboration (2011), “Strange Particle Production in pp collisions at sqrt(s) = 0.9 and 7 TeV, in JHEP 05 (2011) 064, 1-38.
"Measurements of hadron production at CMS"
F. Sikler (2011), "Measurements of hadron production at CMS", in EPJ Web of Conferences Volume 13, 2011 HCBM 2010, 13, 13.
Spectra of weakly decaying identified particles at 0.9 and 7 TeV with the CMS detector",
K. Krajczar (2011), Spectra of weakly decaying identified particles at 0.9 and 7 TeV with the CMS detector",, in EPJ Web of Conferences Volume 13, 2011 HCBM 2010, 13, 13.
“A subtraction scheme for computing QCD jet cross sections at NNLO: integrating the iterated singly-unresolved subtraction terms”.
Paolo Bolzoni Gabor Somogyi Zoltan Trocsanyi (2011), “A subtraction scheme for computing QCD jet cross sections at NNLO: integrating the iterated singly-unresolved subtraction terms”., in JHEP , 1101 (2011) 059, 83.
“Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 0.9 and 2.36 TeV”
V. Khachatryan et al. [CMS Collaboration] (2010), “Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 0.9 and 2.36 TeV”, in JHEP, 02(2010), 041.
Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 7 TeV”, 105 (2010) 022002
V. Khachatryan et al. [CMS Collaboration] (2010), Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 7 TeV”, 105 (2010) 022002, in Phys Rev Lett , 105(022002), 1-14.
“Highlights from CMS”
F. Siklér [for the CMS Collaboration] (2010), “Highlights from CMS”, in Proceedings of the XVIII International Workshop on. Deep-Inelastic Scattering and Related Subjects, .
“QCD Physics from CMS”,
K. Krajczár [for the CMS Collaboration] (2010), “QCD Physics from CMS”,, in PoS (DIS 2010) 117.
“Description and Performance of the CMS Track and Primary Vertex Reconstruction”,
CMS Collaboration, “Description and Performance of the CMS Track and Primary Vertex Reconstruction”,, in JINST, CMS-PAPER-TRK-11-001, CERN (2012)., -61.
Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
CMS Collaboration, Observation of long-range near-side angular correlations in proton-lead collisions at the LHC, in Phys. Lett. B, 2012, (1), 29.

Collaboration

Group / person Country
Types of collaboration
CMS : International Collaboration of many institutions (180) Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Tools for Precision and Discovery Physics with Top Quarks, talk by Z. Trocsanyi 17.07.2012 CERN, Geneva (CH)
Loops and Legs in Quantum Field Theory, talk by Z. Trocsanyi 15.04.2012 Wernigerode (D)
XX International Workshop on Deep Inelastic Scattering and Related Subjects, talk by A. Kardos 26.03.2012 Bonn
LHCPhenonet Annual Meeting, talk by A. Kardos 19.03.2012 St. Andrews, Scotland


Associated projects

Number Title Start Funding scheme
152601 Preparation for and exploitation of the CMS data taking at the next LHC run 01.05.2014 SCOPES
111135 Preparation and exploitation of the first data taking at the Large Hadron Collider 01.11.2005 SCOPES
138111 Search for New Physics with the CMS experiment at LHC 01.10.2011 Project funding (Div. I-III)

Abstract

The Institute for Particle Physics (IPP) of ETH Zurich is one of the leading Institutes participating in the Compact Muon Solenoid (CMS) experiment at CERN’s Large Hadron Collider (LHC). CMS is presently in the commissioning phase in view of the planned LHC re-start in autumn 2009. The design concept of the CMS experiment guarantees full exploitation of the physics potential of-fered by the LHC, which will provide proton-proton collisions at unprecedented centre-of-mass energies of 10 - 14 TeV. CMS has thus a unique prospective for important discoveries in Ele-mentary Particle Physics for the next decade. Two of the most distinctive and important detector systems of the CMS experiment are the high precision Electromagnetic Calorimeter (ECAL), consisting of about 76000 Lead-Tungstate crys-tals, and the muon spectrometer. These systems are crucial for a large spectrum of measure-ments and their good performance is essential for the success of the CMS experiment. From the very beginning the IPP had major responsibility of scientific, technical and managerial nature for this ECAL sub-detector. In particular, we carry the project leadership for the development, construc-tion and operation of the Detector Control System (DCS) of ECAL. This project is realized in col-laboration with scientists from the VINCA Institute and the Faculty of Physics of the University of Belgrade (Serbia). Similarly, Hungarian Institutes from Budapest and Debrecen have taken im-portant responsibilities for the alignment system of the muon spectrometer.This proposal for a Joint Research Project (JRP) is intended to strengthen the already existing and very successful collaboration with our colleagues from Serbia, which manifested itself also in the successful execution of a previous SCOPES JRP, Project Number IB7320-111135. At the same time, we would like to extend this JRP to our colleagues from the Hungarian institutes and thus form a strong and competitive cluster of institutes within the large CMS collaboration. This cluster would build on a large expertise on various important aspects of the CMS experiment and have a competitive role in the upcoming data analyses.The requested funds are intended to allow the Eastern European partners to spend a consider-able amount of time at CERN, both to participate in the operation and maintenance of the detec-tor components mentioned above and to actively take part in the physics and analysis discussions of the collaboration. For smaller Institutes such as those from Serbia and Hungary it is difficult to gain visibility in a very large collaboration like CMS (close to 3000 scientists from about 180 Institutes). Therefore it is important for them to have a strong presence at CERN and a close collaboration with larger Institutes such as the IPP of ETH Zurich.The proposed research topics concern (i) the operation and maintenance of the ECAL safety sys-tem, which is part of the ECAL DCS, and the muon alignment system; and (ii) the participation in first CMS data analyses. Regarding the latter, the plan is to concentrate on measurements of charged particle distributions, which are probably the very first analyses and publications of the CMS experiment, as well as on lepton and photon reconstruction and studies of neutral pion background rejection. The latter is relevant for the low-mass Higgs search and for searches of anomalous Triple Gauge Boson couplings. The period of this JRP (October 2009 to September 2012) fits extremely well with the current LHC and CMS schedules.The objectives and expected results of the proposed JRP can thus be summarized as follows:- Allow for prolonged stays of members from the Serbian and Hungarian research teams at CERN in order to carry out the following research activities:•Operation and maintenance of the CMS ECAL safety system and the muon alignment system•Participation in the final commissioning of the CMS detector and the start-up physics run•Setting up and participation in physics analyses of LHC data, which concentrate on the exploitation of the excellent capabilities of the CMS sub-detectors. •Support of the data analysis activities in terms of theoretical contributions, most notably in the jet production sector of strong interactions. - These activities should result in•Highly efficient and safe operation of the CMS ECAL and precise muon track reconstruc-tion thanks to an optimally aligned muon system•An in-depth understanding of the first CMS data•First Physics results from the analyses of the data collected during the initial years of LHC running, at the centre-of-mass energies of 10 and 14 TeV.Based on the positive experience from the past SCOPES JRP, we are convinced that the strong and visible participation of the Eastern European partners in a fore-front international research project such as the CMS experiment will allow them to (a) further strengthen their scientific capabilities, (b) improve the efficiency of their work and participation within large international collaborations, (c) enhance their national as well as international reputation and thus (d) to at-tract students, funding agencies and industries in their home countries, with evident long-term benefits.
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