Elsevier

Physics Letters B

Volume 692, Issue 2, 23 August 2010, Pages 83-104
Physics Letters B

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

https://doi.org/10.1016/j.physletb.2010.07.033Get rights and content
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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.

Keywords

CMS
Physics
Muon
Cosmic rays
Charge ratio

Cited by (0)

© CERN, for the benefit of the CMS Collaboration.

☆☆

Date submitted: 2010-05-29 08:19:58.

E-mail address: [email protected].

1

Also at CERN, European Organization for Nuclear Research, Geneva, Switzerland.