期刊
EUROPEAN PHYSICAL JOURNAL C
卷 72, 期 9, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-012-2080-4
关键词
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资金
- Austrian Federal Ministry of Science and Research
- Belgium Fonds de la Recherche Scientifique
- Fonds voor Wetenschappelijk Onderzoek
- CNPq
- CAPES
- FAPERJ
- FAPESP
- Bulgarian Ministry of Education and Science
- CERN
- Chinese Academy of Sciences
- Ministry of Science and Technology
- National Natural Science Foundation of China
- Colombian Funding Agency (COLCIENCIAS)
- Croatian Ministry of Science, Education and Sport
- Research Promotion Foundation, Cyprus
- Estonian Academy of Sciences
- NICPB
- Academy of Finland
- Finnish Ministry of Education and Culture
- Helsinki Institute of Physics
- Institut National de Physique Nucleaire et de Physique des Particules/CNRS, France
- Commissariat a l'Energie Atomique et aux Energies Alternatives/CEA, France
- Bundesministerium fur Bildung und Forschung, Germany
- Deutsche Forschungsgemeinschaft, Germany
- Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany
- General Secretariat for Research and Technology, Greece
- National Scientific Research Foundation, Hungary
- National Office for Research and Technology, Hungary
- Department of Atomic Energy, India
- Department of Science and Technology, India
- Institute for Studies in Theoretical Physics and Mathematics, Iran
- Science Foundation, Ireland
- Istituto Nazionale di Fisica Nucleare, Italy
- Korean Ministry of Education, Science and Technology, Korea
- World Class University program of NRF, Korea
- Lithuanian Academy of Sciences
- CINVESTAV
- CONACYT
- SEP
- UASLP-FAI
- Ministry of Science and Innovation, New Zealand
- Pakistan Atomic Energy Commission
- State Commission for Scientific Research, Poland
- Fundacao para a Ciencia e a Tecnologia, Portugal
- JINR (Armenia)
- JINR (Belarus)
- JINR (Georgia)
- JINR (Ukraine)
- JINR (Uzbekistan)
- Ministry of Science and Technologies of the Russian Federation
- Russian Ministry of Atomic Energy
- Russian Foundation for Basic Research
- Ministry of Science and Technological Development of Serbia
- Ministerio de Ciencia e Innovacion, Spain
- Programa Consolider-Ingenio, Spain
- ETH Board
- ETH Zurich
- PSI
- SNF
- UniZH
- Canton Zurich
- SER
- National Science Council, Taipei
- Scientific and Technical Research Council of Turkey
- Turkish Atomic Energy Authority
- Science and Technology Facilities Council, UK
- US Department of Energy
- US National Science Foundation
- Marie-Curie programme
- European Research Council (European Union)
- Leventis Foundation
- A.P. Sloan Foundation
- Alexander von Humboldt Foundation
- Belgian Federal Science Policy Office
- Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)
- Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
- Council of Science and Industrial Research, India
- Science and Technology Facilities Council [PP/D004284/1, ST/J005614/1, ST/K001604/1 GRIDPP, ST/K001604/1 LHCb Upgrades, ST/K001604/1 DMUK, ST/F007434/1, ST/G502347/1, CMS, ST/F006748/1, PP/E002722/1, ST/K001256/1, ST/K001604/1 CMS Upgrade, ST/I003622/1 GRIDPP, ST/H000925/1, ST/I002839/1, ST/F007094/1, ST/K001604/1, ST/K001604/1 T2K, ST/K001604/1 SuperNEMO, ST/J005665/1, ST/K001604/1 LHCb, ST/L001225/1, ST/I000410/1, ST/I505572/1, ST/J004901/1, ST/K000616/1, ST/I002200/1, ST/J004820/1, ST/I505580/1, ST/I005912/1 GRIDPP, ST/G502412/1, ST/I005912/1, GRIDPP, ST/K001604/1 MICE/UKNF] Funding Source: researchfish
- STFC [ST/K000616/1, ST/J004820/1, ST/I000410/1, ST/I005912/1, ST/I505580/1, ST/J005665/1, ST/I002839/1, ST/F007094/1, ST/G502412/1, ST/J004901/1, PP/E002722/1, ST/I002200/1, ST/I505572/1, ST/F007434/1, ST/J005614/1, ST/K001604/1, ST/H00081X/2, ST/H000925/1, ST/F006748/1, ST/L001225/1, ST/G502347/1] Funding Source: UKRI
A measurement of the underlying event (UE) activity in proton-proton collisions at a center-of-mass energy of 7 TeV is performed using Drell-Yan events in a data sample corresponding to an integrated luminosity of 2.2 fb(-1), collected by the CMS experiment at the LHC. The activity measured in the muonic final state (q (q) over bar -> mu(+) mu(-)) is corrected to the particle level and compared with the predictions of various Monte Carlo generators and hadronization models. The dependence of the UE activity on the dimuon invariant mass is well described by PYTHIA and HERWIG++ tunes derived from the leading jet/track approach, illustrating the universality of the UE activity. The UE activity is observed to be independent of the dimuon invariant mass in the region above 40 GeV/c(2), while a slow increase is observed with increasing transverse momentum of the dimuon system. The dependence of the UE activity on the transverse momentum of the dimuon system is accurately described by MADGRAPH, which simulates multiple hard emissions.
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