CERN Accelerating science

Article
Report number arXiv:1403.0244
Title Measurement of TeV atmospheric muon charge ratio with the full OPERA data
Author(s) OPERA Collaboration  Prikaži svih 137 autora
Publication 2014-07-02
Imprint 02 Mar 2014
Number of pages 9
Note Comments: 8 pages, 2 figures, 4 tables
8 pages, 2 figures, 4 tables
In: Eur. Phys. J. C 74 (2014) pp.2933
DOI 10.1140/epjc/s10052-014-2933-0
10.1140/epjc/s10052-014-2933-0
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; OPERA CNGS1
Abstract The OPERA detector, designed to search for ν μ → ν τ oscillations in the CNGS beam, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. For the analysis here presented, the detector was used to measure the atmospheric muon charge ratio in the TeV region. OPERA collected charge- separated cosmic ray data between 2008 and 2012. More than 3 million atmospheric muon events were detected and reconstructed, among which about 110000 multiple muon bundles. The charge ratio R μ ≡ N μ + / N μ − was measured separately for single and for multiple muon events. The anal- ysis exploited the inversion of the magnet polarity which was performed on purpose during the 2012 Run. The com- bination of the two data sets with opposite magnet polarities allowedminimizingsystematicuncertaintiesandreachingan accurate determination of the muon charge ratio. Data were fittedtoobtainrelevant parametersonthecompositionofpri- mary cosmic rays and the associated kaon production in the forward fragmentation region. In the surface energy range 1–20 TeV investigated by OPERA, R μ is well described by a parametric model including only pion and kaon contribu- tions to the muon flux, showing no significant contribution of the prompt component. The energy independence supports the validity of Feynman scaling in the fragmentation region up to 200 TeV/nucleon primary energy
Copyright/License arXiv nonexclusive-distrib. 1.0



Corresponding record in: Inspire


 Zapis kreiran 2014-03-04, zadnja izmjena 2024-03-23


Article from SCOAP3:
Download fulltextPDF
Cjeloviti tekst:
Download fulltextPDF
  • Send to ScienceWise.info