Published August 23, 2010
| Version Published
Journal Article
Open
Measurement of the charge ratio of atmospheric muons with the CMS detector
Abstract
We present a measurement of the ratio of positive to negative muon fluxes from cosmic ray interactions in the atmosphere, using data collected by the CMS detector both at ground level and in the underground experimental cavern at the CERN LHC. Muons were detected in the momentum range from 5 GeV/c to 1 TeV/c. The surface flux ratio is measured to be 1.2766 ± 0.0032 (stat.) ± 0.0032 (syst.), independent of the muon momentum, below 100 GeV/c. This is the most precise measurement to date. At higher momenta the data are consistent with an increase of the charge ratio, in agreement with cosmic ray shower models and compatible with previous measurements by deep-underground experiments.
Additional Information
© CERN, for the benefit of the CMS Collaboration. Published by Elsevier B.V. This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited. Date submitted: 2010-05-29 08:19:58. Received 29 May 2010; revised 7 July 2010; accepted 14 July 2010. Editor: M. Doser. Available online 23 July 2010. We thank the technical and administrative staff 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 Scientifique, 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 Helsinki Institute of Physics; the Institut National de Physique Nucléaire et de Physique des Particules/CNRS, and Commissariat à l'Énergie Atomique, 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 Scientific Research Foundation, and National Office for Research and Technology, Hungary; the Department of Atomic Energy, and 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 Pakistan Atomic Energy Commission; the State Commission for Scientific 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, and Russian Ministry of Atomic Energy; the Ministry of Science and Technological Development of Serbia; the Ministerio de Ciencia e Innovación, 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 Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authority; the Science and Technology Facilities Council, UK; the US Department of Energy, and the US National Science Foundation. Individuals have received support from the Marie-Curie IEF program (European Union); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; and the Associazione per lo Sviluppo Scientifico e Tecnologico del Piemonte (Italy).Attached Files
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Additional details
Identifiers
- Eprint ID
- 20489
- Resolver ID
- CaltechAUTHORS:20101022-150802478
Funding
- Austrian Federal Ministry of Science and Research
- Belgium Fonds de la Recherche Scientifique, and Fonds voor Wetenschappelijk Onder-zoek
- Conselho Nacional de Desenvolvimento Cientificico e Tecnologico (CNPq)
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
- Bulgarian Ministry of Education and Science
- European Organization for Nuclear Research (CERN)
- Chinese Academy of Sciences, Ministry of Science and Technology
- National Natural Science Foundation of China
- COLCIENCIAS
- Croatian Ministry of Science, Education and Sport
- Research Promotion Foundation, Cyprus
- Estonian Academy of Sciences
- National Institute of Chemical Physics and Biophysics (NICPB)
- Academy of Finland, Finnish Ministry of Education
- Helsinki Institute of Physics
- Institut National de Physique Nucleaire et de Physique des Particules/CNRS
- Commissariat a l'Energie Atomique (CEA)
- Bundesministerium fur Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Helmholtz-Gemeinschaft Deutscher Forschungszentren
- General Secretariat for Research and Technology, Greece
- National Scientific Research Foundation
- National Office for Research and Technology, Hungary
- Department of Atomic Energy
- Department of Science and Technology, India
- Institute for Studies in Theoretical Physics and Mathematics, Iran
- Science Foundation, Ireland
- Istituto Nazionale di Fisica Nucleare (INFN)
- Korean Ministry of Education, Science and Technology
- National Research Foundation of Korea (NRF)
- Lithuanian Academy of Sciences
- CINVESTAV
- Consejo Nacional de Ciencia y Tecnología (CONACYT)
- Secretaría de Educación Pública (SEP)
- UASLP-FAI
- Pakistan Atomic Energy Commission
- State Commission for Scientific Research, Poland
- Fundação para a Ciência e a Tecnologia (FCT)
- JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)
- Ministry of Science and Technologies of the Russian Federation
- Russian Ministry of Atomic Energy
- Ministry of Science and Technological Development of Serbia
- Ministerio de Ciencia e Innovacion, and Programa Consolider-Ingenio 2010, Spain
- ETH Board
- ETH Zurich
- PSI
- Stanford Nanofabrication Facility (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 (STFC)
- Department of Energy (DOE)
- NSF
- European Union
- Leventis Foundation
- Alfred P. Sloan Foundation
- Alexander von Humboldt Foundation
- Associazione per lo Sviluppo Scientifico e Tecnologico del Piemonte
Dates
- Created
-
2010-10-25Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field