Measurement of the Charge Ratio of Atmospheric Muons with the CMS Detector

2010/09/06 by Gavin Hesketh, Hesketh, Gavin · 2 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.1009.1036

Invited talk given at XVI International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 2010), Batavia, IL, USA, 28 June - 2 July 2010. 4 pages

arxiv created 2010/10/06 · arxiv updated 2010/10/07

Abstract

This paper describes a new measurement of the flux ratio of positive and negative muons from cosmic-ray interactions in the atmosphere, using data collected by the CMS detector at ground level and in the underground experimental cavern. The excellent performance of the CMS detector allowed detection of muons in the momentum range from 3 GeV to 1 TeV. For muon momenta below 100 GeV the flux ratio is measured to be a constant 1.2766 ± 0.0032(stat) ± 0.0032(syst), the most precise measurement to date. At higher momenta an increase in the charge asymmetry is observed, in agreement with models of muon production in cosmic-ray showers and compatible with previous measurements by deep-underground experiments.

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• Dark Matter Induced Neutron Production Search Limits
• Cosmic Ray Muon Polarization to Facilitate Atmospheric Neutrino Physics

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