Decays of Long-Lived Relics and Their Signatures at IceCube. (arXiv:1811.04939v1 [hep-ph])

Decays of Long-Lived Relics and Their Signatures at IceCube. (arXiv:1811.04939v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Berghaus_K/0/1/0/all/0/1">Kim V. Berghaus</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Diamond_M/0/1/0/all/0/1">Melissa D. Diamond</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Kaplan_D/0/1/0/all/0/1">D. E. Kaplan</a>

We consider long-lived relic particles as the source of the PeV-scale
neutrinos detected at the IceCube observatory over the last six years. We
derive the present day neutrino flux, including primary neutrinos from direct
decays, secondary neutrinos from electroweak showering, and tertiary neutrinos
from re-scatters off the relic neutrino background. We compare the high-energy
neutrino flux prediction to the most recently available datasets and find
qualitative differences to expected spectra from other astrophysical processes.
We utilize EW corrections to constrain heavy decaying relic abundances, using
measurements impacted by EM energy injection, such as light element abundances
during BBN, CMB anisotropies, and diffuse $gamma$-ray spectra. We compare
these abundances to those necessary to source the IceCube neutrinos and find
two viable regions in parameter space, ultimately testable by future neutrino,
$gamma$-ray, and CMB observatories.

We consider long-lived relic particles as the source of the PeV-scale
neutrinos detected at the IceCube observatory over the last six years. We
derive the present day neutrino flux, including primary neutrinos from direct
decays, secondary neutrinos from electroweak showering, and tertiary neutrinos
from re-scatters off the relic neutrino background. We compare the high-energy
neutrino flux prediction to the most recently available datasets and find
qualitative differences to expected spectra from other astrophysical processes.
We utilize EW corrections to constrain heavy decaying relic abundances, using
measurements impacted by EM energy injection, such as light element abundances
during BBN, CMB anisotropies, and diffuse $gamma$-ray spectra. We compare
these abundances to those necessary to source the IceCube neutrinos and find
two viable regions in parameter space, ultimately testable by future neutrino,
$gamma$-ray, and CMB observatories.

http://arxiv.org/icons/sfx.gif