Neutrino yield from Galactic cosmic rays
arXiv:1405.3797 · doi:10.1103/PhysRevD.90.083002
Abstract
We calculate the neutrino yield from collisions of cosmic ray (CR) nuclei on gas using the event generator QGSJET-II. We present first the general characteristics and numerical results for the neutrino yield assuming power-law fluxes for the primary CR nuclei. Then we use three parameterisations for the Galactic CR flux to derive the neutrino yield for energies around and above the knee. The shape and the normalization of the resulting neutrino flux above eV depends on the composition of the Galactic CR flux employed, but is generally dominated by its proton component. The spectral shape and magnitude of the neutrino flux suggest that the IceCube excess is not connected to interactions of Galactic sea CRs. If a fraction of these events has a Galactic origin, then they may be caused by CR overdensities around recent close-by Galactic sources.
9 pages; 7 eps figures; v2: Hillas model corrected, contains bonus material compared to the published version
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