Prompt neutrino fluxes from atmospheric charm
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We calculate the prompt neutrino flux from atmospheric charm production by cosmic rays, using the dipole picture in a perturbative QCD framework, which incorporates the parton saturation effects present at high energies. We compare our results with the next-to-leading order perturbative QCD result and find that saturation effects are large for neutrino energies above 10^6 GeV, leading to a substantial suppression of the prompt neutrino flux. We comment on the range of prompt neutrino fluxes due to theoretical uncertainties.
13 pages with 11 figures; expanded discussion, added references, version to be published in Phys. Rev. D
13 pages with 11 figures; expanded discussion, added references, version to be published in Phys. Rev. D