Probing dark matter annihilaiton to right-handed neutrinos

Probing dark matter annihilaiton to right-handed neutrinos

We study indirect detection signals from solar annihilation of dark matter (DM) particles into light right-handed (RH) neutrinos with a mass in the 1 − 5 GeV range. These RH neutrinos can have a sufficiently long lifetime to allow them to decay outside the Sun and their delayed decays can result in...

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1. Verfasser: Allahverdi, Rouzbeh
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Dark matter
Elastic scattering
Gamma rays
Neutrinos
Scattering cross sections
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description We study indirect detection signals from solar annihilation of dark matter (DM) particles into light right-handed (RH) neutrinos with a mass in the 1 − 5 GeV range. These RH neutrinos can have a sufficiently long lifetime to allow them to decay outside the Sun and their delayed decays can result in a signal in gamma rays from the otherwise ‘dark’ solar direction, as well as a neutrino signal that is not suppressed by the interactions with solar medium. We show that the latest Fermi-LAT and IceCube results place limits on these gamma ray and neutrino signals, respectively, and the combined bounds can constrain the spin-independent DM-nucleon elastic scattering cross section better than direct detection experiments for DM masses from 200 GeV up to several TeV. The bounds on spin-dependent scattering cross section are also much tighter than the strongest limits from direct detection experiments.
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subjects Dark matter
Elastic scattering
Gamma rays
Neutrinos
Scattering cross sections
title Probing dark matter annihilaiton to right-handed neutrinos
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