Experimental results on the atmospheric muon charge ratio
Dipartimento di Fisica e Astronomia dell'Università di Bologna and INFN, Sezione di Bologna, Viale Berti Pichat 6/2, 40127 Bologna, Italy
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Published online: 6 July 2016
The atmospheric muon charge ratio, defined as the number of positive over negative charged muons, is a highly informative observable both for cosmic rays and particle physics. It allows studying the features of high-energy hadronic interactions in the forward region and the composition of primary cosmic rays. In this review results from underground experiments measuring the charge ratio around 1 TeV are discussed. The measurements in the TeV energy region constrain the associated kaon production, which is particularly important e.g. for the calculation of the atmospheric neutrino flux.
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