Contribution Poster high energy neutrinos & cosmic rays
A Multi-Component Model for the Observed Astrophysical Neutrinos
Session and Location
Wednesday Session, Poster Wall #170 (Ballroom)
In the last few years, the IceCube experiment has opened a new era in neutrino astronomy, providing the first evidence for high-energy astrophysical neutrinos. The origin of these neutrinos is still unknown and some contradictions in the data are present, such as the different observed spectral indices in the high-energy starting and through-going muon samples, a possible anisotropy due to Galactic events, the non-observation of point sources, and the constraint from the extragalactic diffuse gamma-ray background. We propose a multi-component model for the observed diffuse neutrino flux, including the residual atmospheric backgrounds, a Galactic contribution, an extragalactic contribution from pp interactions (such as from starburst galaxies) and a hard extragalactic contribution from photo-hadronic interactions at the highest energies (such as from Tidal Disruption Events or Active Galactic Nuclei). This model can successfully address the key problems of astrophysical neutrino data.
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