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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Are IceCube neutrinos unveiling PeV-scale decaying dark matter?

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Esmaili, Arman [1] ; Serpico, Pasquale Dario [2]
Total Authors: 2
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Savoie, LAPTh, CNRS, F-74941 Annecy Le Vieux - France
Total Affiliations: 2
Document type: Journal article
Source: Journal of Cosmology and Astroparticle Physics; n. 11 NOV 2013.
Web of Science Citations: 82

Recent observations by IceCube, notably two PeV cascades accompanied by events at energies similar to (30-400) TeV, are clearly in excess over atmospheric background fluxes and beg for an astroparticle physics explanation. Although some models of astrophysical accelerators can account for the observations within current statistics, intriguing features in the energy and possibly angular distributions of the events make worth exploring alternatives. Here, we entertain the possibility of interpreting the data with a few PeV mass scale decaying dark matter, with lifetime of the order of 10(27) s. We discuss generic signatures of this scenario, including its unique energy spectrum distortion with respect to the benchmark E-v(-2) expectation for astrophysical sources, as well as peculiar anisotropies. A direct comparison with the data show a good match with the above-mentioned features. We further discuss possible future checks of this scenario. (AU)

FAPESP's process: 09/17924-5 - Neutrino phenomenology in neutrino telescopes
Grantee:Arman Esmaili Taklimi
Support type: Scholarships in Brazil - Post-Doctorate