Lepton Fluxes from Atmospheric Charm

Abstract

We reexamine the charm contribution to atmospheric lepton fluxes in the context of perturbative QCD. We include next-to-leading order corrections and discuss theoretical uncertainties due to the extrapolations of the gluon distributions at small-x. We show that the charm contribution to the atmospheric muon flux becomes dominant over the conventional contribution from pion and kaon decays at energies of about 10^5 GeV. We compare our fluxes with previous calculations.

19 pages, latex, revtex, psfig

References in corpus (2)

• Neutrino Interactions at Ultrahigh Energies
• Secondary Decays in Atmospheric Charm Contributions to the Flux of Muons and Muon Neutrinos

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