skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Are IceCube neutrinos unveiling PeV-scale decaying dark matter?

Abstract

Recent observations by IceCube, notably two PeV cascades accompanied by events at energies ∼ (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{sup 27} s. We discuss generic signatures of this scenario, including its unique energy spectrum distortion with respect to the benchmark E{sub ν}{sup −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.

Authors:
 [1]
  1. Instituto de Fisica Gleb Wataghin - UNICAMP, Campinas, SP, 13083-859 (Brazil)
Publication Date:
OSTI Identifier:
22369902
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANGULAR DISTRIBUTION; ASTROPHYSICS; DECAY; ENERGY SPECTRA; NEUTRINOS; NONLUMINOUS MATTER; PEV RANGE; STATISTICS; TEV RANGE

Citation Formats

Esmaili, Arman, and Serpico, Pasquale Dario, E-mail: aesmaili@ifi.unicamp.br, E-mail: serpico@lapth.cnrs.fr. Are IceCube neutrinos unveiling PeV-scale decaying dark matter?. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/11/054.
Esmaili, Arman, & Serpico, Pasquale Dario, E-mail: aesmaili@ifi.unicamp.br, E-mail: serpico@lapth.cnrs.fr. Are IceCube neutrinos unveiling PeV-scale decaying dark matter?. United States. doi:10.1088/1475-7516/2013/11/054.
Esmaili, Arman, and Serpico, Pasquale Dario, E-mail: aesmaili@ifi.unicamp.br, E-mail: serpico@lapth.cnrs.fr. Fri . "Are IceCube neutrinos unveiling PeV-scale decaying dark matter?". United States. doi:10.1088/1475-7516/2013/11/054.
@article{osti_22369902,
title = {Are IceCube neutrinos unveiling PeV-scale decaying dark matter?},
author = {Esmaili, Arman and Serpico, Pasquale Dario, E-mail: aesmaili@ifi.unicamp.br, E-mail: serpico@lapth.cnrs.fr},
abstractNote = {Recent observations by IceCube, notably two PeV cascades accompanied by events at energies ∼ (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{sup 27} s. We discuss generic signatures of this scenario, including its unique energy spectrum distortion with respect to the benchmark E{sub ν}{sup −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.},
doi = {10.1088/1475-7516/2013/11/054},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2013,
place = {United States},
year = {2013},
month = {11}
}