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

Khachatryan, Vladimir; Cabrillo Bartolomé, José Iban; Calderón Tazón, Alicia; Chuang, S. H.; Díaz Merino, Irma; Díaz González, Carlos; Duarte Campderros, Jorge; Fernández García, Marcos; Gómez Gramuglio, Gervasio; González Sánchez, Francisco Javier; González Suárez, Rebeca; Jordá Lope, Clara; Lobelle Pardo, Patricia; López Virto, María Amparo; Marco de Lucas, Jesús; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Martínez Ruiz del Árbol, Pablo; Matorras Weinig, Francisco; Rodrigo Anoro, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Sobrón Sañudo, Mar; Vila Álvarez, Iván; Vilar Cortabitarte, Rocío

doi:10.1016/j.physletb.2010.07.033

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Identificadores

URI: https://hdl.handle.net/10902/28037

DOI: 10.1016/j.physletb.2010.07.033

ISSN: 0370-2693

ISSN: 1873-2445

; [et al.]

Fecha

2010-08-23

Derechos

Publicado en

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2010, 692(2),83-104

Editorial

Elsevier

Enlace a la publicación

https://doi.org/10.1016/j.physletb.2010.07.033

Palabras clave

CMS

Physics

Muon

Cosmic rays

Charge ratio

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 deep-underground experiments

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