Phys. Rev. D 62, 032007 (2000) [15 pages]Measurement of the flux of atmospheric muons with the CAPRICE94 apparatusReceived 2 February 2000; published 12 July 2000 A new measurement of the momentum spectra of both positive and negative muons as a function of atmospheric depth was made by the balloon-borne experiment CAPRICE94. The data were collected during ground runs in Lynn Lake on 19 and 20 July 1994 and during the balloon flight on 8 and 9 August 1994. We present results that cover the momentum intervals 0.3–40 GeV/c for μ - and 0.3–2 GeV/c for μ +, for atmospheric depths from 3.3 to 1000 g/cm2, respectively. Good agreement is found with previous measurements for high momenta, while at momenta below 1 GeV/c we find latitude dependent geomagnetic effects. These measurements are important cross-checks for the simulations carried out to calculate the atmospheric neutrino fluxes and to understand the observed atmospheric neutrino anomaly. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.62.032007
DOI:
10.1103/PhysRevD.62.032007
PACS:
96.40.Tv, 14.60.Ef, 14.60.Pq
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