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Measurement of the charge ratio of atmospheric muons with the CMS detector

Author(s)
Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; D'Enterria, David; Everaerts, Pieter Bruno Bart; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Li, W.; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Rudolph, Matthew Scott; Stephans, George S. F.; Wenger, Edward Allen; Wyslouch, Boleslaw; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; Roland, Christof E; Sumorok, Konstanty C; Xie, Si; Alver, Burak Han; Bauer, Gerry P; Harris, Philip Coleman; Lee, Yen-Jie; Loizides, Constantinos; Luckey Jr, P David; ... Show more Show less
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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.
Date issued
2010-07
URI
http://hdl.handle.net/1721.1/96052
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of Science
Journal
Physics Letters B
Publisher
Elsevier
Citation
Khachatryan, V., A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, et al. “Measurement of the Charge Ratio of Atmospheric Muons with the CMS Detector.” Physics Letters B 692, no. 2 (August 2010): 83–104.
Version: Final published version
ISSN
03702693

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