Flavor composition of the IceCube neutrinos: A quest for sterile neutrinos?

Biondi, R. (2016) Flavor composition of the IceCube neutrinos: A quest for sterile neutrinos? Il nuovo cimento C, 39 (1). pp. 1-6. ISSN 1826-9885

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The identification of flavor content in the cosmic high-energy neutrinos recently observed by the IceCube collaboration could spread the light on the origin of these neutrinos. We study the expected fraction of muon tracks for different cases of the neutrino flavor composition at the sources taking into account uncertainties in the neutrino mixing angles and CP-phase. We show that in the frame of the three known neutrinos it is hard to explain the νμ fraction observed at IceCube. However if the cosmic component is produced in some hidden sector, in the form of sterile neutrinos which then oscillate into ordinary ones, a better agreement can be obtained. Especially, in a scenario when heavy dark matter with mass of few PeV decay into sterile neutrinos which then oscillate in ordinary neutrinos due to tiny mixing with the latter, it is possible to explain the low fraction of muon tracks in the events observed by IceCube in the energy region from 60TeV to 2PeV.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 13 Jul 2020 20:18
Last Modified: 13 Jul 2020 20:18
URI: http://eprints.bice.rm.cnr.it/id/eprint/19266

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