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

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URI: https://hdl.handle.net/10902/28408
ISSN: 1810-6528
ISSN: 1810-6536
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Autoría
Calderón Tazón, AliciaAutoridad Unican
Fecha
2011-03
Derechos
Atribución 3.0 España. © Author(s) 2011. CC Attribution 3.0 License.
Publicado en
Astrophysics and Space Sciences Transactions, 2011, 7(1), 79-83
Editorial
Copernicus Publications
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Resumen/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 underground experiments.
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Atribución 3.0 España. © Author(s) 2011. CC Attribution 3.0 License.Excepto si se señala otra cosa, la licencia del ítem se describe como Atribución 3.0 España. © Author(s) 2011. CC Attribution 3.0 License.