publication . Article . Preprint . 2018

Probing the sterile neutrino portal to Dark Matter with $γ$ rays

Folgado, Miguel G.; Gómez-Vargas, Germán A.; Rius, Nuria; de Austri, Roberto Ruiz;
Open Access
  • Published: 01 Aug 2018 Journal: Journal of Cosmology and Astroparticle Physics, volume 2,018, pages 2-2 (eissn: 1475-7516, Copyright policy)
  • Publisher: IOP Publishing
Sterile neutrinos could provide a link between the Standard Model particles and a dark sector, besides generating active neutrino masses via the seesaw mechanism type I. We show that, if dark matter annihilation into sterile neutrinos determines its observed relic abundance, it is possible to explain the Galactic Center $\gamma$-ray excess reported by the Fermi-LAT Collaboration as due to an astrophysical component plus dark matter annihilations. We observe that sterile neutrino portal to dark matter provides an impressively good fit, with a p-value of 0.78 in the best fit point, to the Galactic Center $\gamma$-ray flux, for DM masses in the range (40-80) GeV an...
arXiv: Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::ExperimentAstrophysics::Cosmology and Extragalactic AstrophysicsHigh Energy Physics::PhenomenologyAstrophysics::Galaxy Astrophysics
free text keywords: Astronomy and Astrophysics, Physics, Seesaw mechanism, Dark matter halo, Milky Way, Dark matter, Sterile neutrino, Galaxy, Standard Model, Particle physics, Neutrino, High Energy Physics - Phenomenology
Related Organizations
Funded by
EC| InvisiblesPlus
  • Funder: European Commission (EC)
  • Project Code: 690575
  • Funding stream: H2020 | MSCA-RISE
The Elusives Enterprise: Asymmetries of the Invisible Universe
  • Funder: European Commission (EC)
  • Project Code: 674896
  • Funding stream: H2020 | MSCA-ITN-ETN
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