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Title: Confronting the galactic center gamma-ray excess with a light scalar dark matter

The Fermi Large Area Telescope observed an excess in gamma-ray emission spectrum coming from the center of the Milky Way galaxy. This data reveals that a light dark matter (DM) candidate of mass in the range 31–40 GeV, dominantly decaying into bb{sup -bar} final state, can explain the presence of the observed bump in photon energy. We try to interpret this observed phenomena by sneutrino DM annihilation into pair of fermions in the Supersymmetric Inverse Seesaw Model (SISM). This model can also account for tiny non-zero neutrino masses satisfying existing neutrino oscillation data. We show that a Higgs portal DM in this model is in perfect agreement with this new interpretation besides satisfying all other existing collider, cosmological and low energy experimental constraints.
Authors:
; ;  [1]
  1. Department of Theoretical Physics, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata, 700032 (India)
Publication Date:
OSTI Identifier:
22454513
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 02; Other Information: PUBLISHER-ID: JCAP02(2015)035; OAI: oai:repo.scoap3.org:9338; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Sponsoring Org:
SCOAP3, CERN, Geneva (Switzerland)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANNIHILATION; EMISSION SPECTRA; GAMMA RADIATION; GEV RANGE; HIGGS MODEL; MILKY WAY; NEUTRINO OSCILLATION; NEUTRINOS; NONLUMINOUS MATTER; PHOTONS; SUPERSYMMETRY; TELESCOPES