On the parametrization of atmospheric muon angular flux underwater

Abstract

The analytical expression for angular integral flux of atmospheric muons in matter with the explicit relation of its parameters with those of the sea level spectrum is obtained. The fitting formula for the sea level muon spectrum at different zenith angles for spherical atmosphere is proposed. The concrete calculations for pure water are presented. Fluctuations of muon energy losses are taken into account by means of parametrized correction factor calculated using survival probabilities resulted from Monte Carlo simulations. Parametrizations of all continuous energy losses are obtained with using the most recent expressions for muon interaction cross-sections. The corresponding parametrization errors and field of method application are comprehensively discussed. The proposed formulae could be useful primarily for experimentalists processing data of arrays located deep under water or under ice.

23 pages, 15 .eps figures, uses aps.sty, aps10.sty, prabib.sty, revtex.sty

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• Prompt atmospheric neutrinos and muons: NLO vs LO QCD predictions
• Narrow muon bundles from muon pair production in rock
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• Dependence of atmospheric muon flux on seawater depth measured with the first KM3NeT detection units
• On the Accuracy of Underground Muon Intensity Calculations
• Secondary atmospheric tau neutrino production
• Cross sections and energy loss for lepton pair production in muon transport
• A parameterisation of single and multiple muons in the deep water or ice
• Detection potential to point-like neutrino sources with the NEMO-km3 telescope
• On the detection of TeV gamma-rays from GRB with km-cube neutrino telescopes --- I. Muon event rate from single GRBs
• High energy leptons from muons in transit