Measurement of the flux of atmospheric muons with the CAPRICE94 apparatus

Abstract

A new measurement of the momentum spectra of both positive and negative muons as function of atmospheric depth was made by the balloon-borne experiment CAPRICE94. The data were collected during ground runs in Lynn Lake on the 19-20th of July 1994 and during the balloon flight on the 8-9th of August 1994. We present results that cover the momentum intervals 0.3-40 GeV/c for negative muons and 0.3-2 GeV/c for positive muons, for atmospheric depths from 3.3 to 1000 g/cm**2, 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.

28 pages, 13 Postscript figures, uses revtex.sty, to appear in Phys. Rev. D

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• A Compilation of High Energy Atmospheric Muon Data at Sea Level
• Atmospheric neutrino flux supported by recent muon experiments
• Study of cosmic ray interaction model based on atmospheric muons for the neutrino flux calculation
• Comparison of the FLUKA calculations with CAPRICE94 data on muons in atmosphere
• DAEMONFLUX: DAta-drivEn MuOn-calibrated atmospheric Neutrino Flux
• Is there an enhancement of muons at sea level from transient events?
• Flux of atmospheric muons: Comparison between AIRES simulations and CAPRICE98 data
• The influence of the geomagnetic field and of the uncertainties in the primary spectrum on the development of the muon flux in the atmosphere
• Distributions of secondary muons at sea level from cosmic gamma rays below 10 TeV
• Calculation of the Solar Activity Effect on the Production Rate of Cosmogenic Radiocarbon in Polar Ice