Abstract

We examine in detail the detectability of a signal of diffuse high energy neutrinos producedin the Milky Way by the interaction of cosmic rays (CRs) with the interstellarmedium (ISM). We show that highly inhomogeneous galactic CR densities arisenaturally from large-scale drift effects and the inhomogeneous distribution ofCR sources. In particular, the CR density in the Galactic Centre region (wherethe ISM density is maximal) could be an order of magnitude larger than thelocal CR density. Hence, the expected diffuse flux of neutrinos from the GalacticCentre region becomes enhanced and could be detected at energies above∼104 GeVin a km3-size neutrino telescope within ten years of operation. The galactic anisotropy, which is themain signature of this flux, allows us to discriminate this signal from other possibleextraterrestrial diffuse fluxes of high energy neutrinos.

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