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Title: A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model

Observations with the Fermi Large Area Telescope (LAT) indicate an excess in gamma rays originating from the center of our Galaxy. A possible explanation for this excess is the annihilation of Dark Matter particles. We have investigated the annihilation of neutralinos as Dark Matter candidates within the phenomenological Minimal Supersymmetric Standard Model (pMSSM). An iterative particle filter approach was used to search for solutions within the pMSSM. We found solutions that are consistent with astroparticle physics and collider experiments, and provide a fit to the energy spectrum of the excess. The neutralino is a Bino/Higgsino or Bino/Wino/Higgsino mixture with a mass in the range 84–92 GeV or 87–97 GeV annihilating into W bosons. A third solutions is found for a neutralino of mass 174–187 GeV annihilating into top quarks. The best solutions yield a Dark Matter relic density 0.06<Ωh{sup 2}<0.13. These pMSSM solutions make clear forecasts for LHC, direct and indirect DM detection experiments. If the pMSSM explanation of the excess seen by Fermi-LAT is correct, a DM signal might be discovered soon.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [4] ;  [5]
  1. Institute for Mathematics, Astrophysics and Particle Physics,Faculty of Science, Mailbox 79, Radboud University Nijmegen,P.O. Box 9010, NL-6500 GL Nijmegen (Netherlands)
  2. Albert Ludwigs University Freiburg, Freiburg (Germany)
  3. (Netherlands)
  4. Instituto de Física Corpuscular, IFIC-UV/CSIC, Valencia (Spain)
  5. GRAPPA, University of Amsterdam (Netherlands)
Publication Date:
OSTI Identifier:
22458359
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 08; Other Information: PUBLISHER-ID: JCAP08(2015)006; OAI: oai:repo.scoap3.org:11321; 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; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; CERN LHC; ENERGY SPECTRA; GALAXIES; GAMMA RADIATION; GEV RANGE; MATHEMATICAL SOLUTIONS; NEUTRALINOS; NONLUMINOUS MATTER; SIGNALS; STANDARD MODEL; SUPERSYMMETRY; T QUARKS; TELESCOPES; W MINUS BOSONS; W PLUS BOSONS