Exclusive γγ → µ^+µ^- production in proton-proton collisions at √s = 7 TeV
Abstract
A measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at s=7 TeV, pp → pμ^+ μ^−p, is reported using data corresponding to an integrated luminosity of 40 pb^(−1). For muon pairs with invariant mass greater than 11.5 GeV, transverse momentum p_T (μ) > 4 GeV and pseudorapidity |η(μ)| < 2.1, a fit to the dimuon p_T (μ^+ μ^−) distribution results in a measured cross section of σ(p → pμ^+ μ^−p) = 338^(+058)_(−055) (stat.) ± 0.16 (syst.) ± 0.14 (lumi.) pb, consistent with the theoretical prediction evaluated with the event generator Lpair. The ratio to the predicted cross section is 083^(+058)_(−013) (stat.) ± 0.04 (syst.) ± 0.03 (lumi.). The characteristic distributions of the muon pairs produced via γγ fusion, such as the muon acoplanarity, the muon pair invariant mass and transverse momentum agree with those from the theory.
Additional Information
© 2012 CERN, for the benefit of the CMS collaboration. Published for SISSA by Springer. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. Received: November 23, 2011. Accepted: December 21, 2011. Published: January 11, 2012. We wish to congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative sta at CERN and other CMS institutes. This work was supported by the Austrian Federal Ministry of Science and Research; the Belgium Fonds de la Recherche Scientique, and Fonds voor Wetenschappelijk Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES, FAPERJ, and FAPESP); the Bulgarian Ministry of Education and Science; CERN; the Chinese Academy of Sciences, Ministry of Science and Technology, and National Natural Science Foundation of China; the Colombian Funding Agency (COLCIENCIAS); the Croatian Ministry of Science, Education and Sport; the Research Promotion Foundation, Cyprus; the Estonian Academy of Sciences and NICPB; the Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of Physics; the Institut National de Physique Nucléaire et de Physique des Particules / CNRS, and Commissariat à l'Énergie Atomique et aux Énergies Alternatives / CEA, France; the Bundesministerium für Bildung und Forschung, Deutsche Forschungsgemeinschaft, and Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany; the General Secretariat for Research and Technology, Greece; the National Scientic Research Foundation, and National Office for Research and Technology, Hungary; the Department of Atomic Energy and the Department of Science and Technology, India; the Institute for Studies in Theoretical Physics and Mathematics, Iran; the Science Foundation, Ireland; the Istituto Nazionale di Fisica Nucleare, Italy; the Korean Ministry of Education, Science and Technology and the World Class University program of NRF, Korea; the Lithuanian Academy of Sciences; the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP, and UASLP-FAI); the Ministry of Science and Innovation, New Zealand; the Pakistan Atomic Energy Commission; the State Commission for Scientic Research, Poland; the Fundação para a Ciência e a Tecnologia, Portugal; JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); the Ministry of Science and Technologies of the Russian Federation, the Russian Ministry of Atomic Energy and the Russian Foundation for Basic Research; the Ministry of Science and Technological Development of Serbia; the Ministerio de Ciencia e Innovaciόn, and Programa Consolider-Ingenio 2010, Spain; the Swiss Funding Agencies (ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SER); the National Science Council, Taipei; the Scientic and Technical Research Council of Turkey, and Turkish Atomic Energy Authority; the Science and Technology Facilities Council, U.K.; the U.S. Department of Energy, and the U.S. National Science Foundation. Individuals have received support from the Marie-Curie programme and the European Research Council (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIABelgium); the Agentschap voor Innovatie doorWetenschap en Technologie (IWT-Belgium); and the Council of Science and Industrial Research, India.Attached Files
Published - Chatrchyan2012p17965J_High_Energy_Phys.pdf
Files
Name | Size | Download all |
---|---|---|
md5:0c9c91014763da1270f464e23414e6eb
|
794.4 kB | Preview Download |
Additional details
- Alternative title
- Exclusive photon-photon production of muon pairs in proton-proton collisions at s√=7 TeV
- Eprint ID
- 31340
- Resolver ID
- CaltechAUTHORS:20120508-094329148
- Austrian Federal Ministry of Science and Research
- Belgium Fonds de la Recherche Scientifique
- Fonds voor Wetenschappelijk Onderzoek
- CNPq (Brazil)
- CAPES (Brazil)
- FAPERJ (Brazil)
- FAPESP (Brazil)
- Bulgarian Ministry of Education and Science
- CERN
- Chinese Academy of Sciences
- Ministry of Science and Technology
- National Natural Science Foundation of China
- COLCIENCIAS (Colombia)
- Croatian Ministry of Science, Education and Sport
- Research Promotion Foundation, Cyprus
- Estonian Academy of Sciences and NICPB
- Academy of Finland
- Finnish Ministry of Education and Culture, and Helsinki Institute of Physics
- Institut National de Physique Nucléaire et de Physique des Particules/CNRS
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA) France
- Bundesministerium für Bildung und Forschung (Germany)
- Deutsche Forschungsgemeinschaft
- Helmholtz-Gemeinschaft Deutscher Forschungszentren (Germany)
- General Secretariat for Research and Technology, Greece
- National Scientic Research Foundation
- National Office for Research and Technology, Hungary
- Department of Atomic Energy and Department of Science and Technology of 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 and the World Class University Program of NRF (KOREA)
- Lithuanian Academy of Sciences
- CINVESTAV (Mexico)
- CONACyT (Mexico)
- SEP and UASLP-FAI (Mexico)
- Ministry of Science and Innovation, New Zealand
- Pakistan Atomic Energy Commission
- State Commission for Scientific Research (Poland)
- Fundação para a Ciência e a Tecnologia (Portugal)
- JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)
- Ministry of Science and Technologies of the Russian Federation
- Russian Ministry of Atomic Energy and the Russian Foundation for Basic Research
- Ministry of Science and Technological Development of Serbia
- Ministerio de Ciencia e Innovaciόn, and Programa Consolider-Ingenio 2010, Spain
- ETH Board
- ETH Zurich
- PSI
- SNF
- UniZH
- Canton Zurich and SER
- National Science Council, Taipei
- Scientific and Technical Research Council of Turkey
- Turkish Atomic Energy Authority
- Science and Technology Facilities Council (UK)
- Department of Energy (DOE)
- NSF
- Marie Curie IEF program (European Union)
- Leventis Foundation
- A. P. Sloan Foundation
- Alexander von Humboldt Foundation
- Belgian Federal Science Policy Office
- Fonds pour la Formation à la Recherche dans l'índustrie et dans l'Ágriculture (FRIA-Belgium)
- Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
- Council of Science and Industrial Research, India
- Created
-
2012-05-08Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Caltech groups
- CMS@Caltech