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Title: Extended gamma-ray emission from Coy Dark Matter

We show that it is possible for WIMP dark matter to produce a large signal in indirect dark matter searches without producing signals elsewhere. We illustrate our point by fitting the Fermi-LAT extended galactic gamma-ray excess with a simple model of Dirac dark matter that annihilates primarily into b quarks via a pseudoscalar. Current collider constraints are weak while the 14 TeV LHC run will constrain a limited portion of the parameter space. No signal is expected in additional indirect searches or at future direct detection experiments. Our results emphasise the importance of fully understanding potential indirect signals of dark matter as they may provide the only information about the dark matter particle.
Authors:
; ; ;  [1] ;  [2]
  1. Institute for Particle Physics Phenomenology, Durham University, South Road, Durham, DH1 3LE (United Kingdom)
  2. Theory Group, SLAC National Accelerator Laboratory, Menlo Park, CA 94025 (United States)
Publication Date:
OSTI Identifier:
22373608
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 05; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; B QUARKS; CERN LHC; GAMMA RADIATION; INFORMATION; NONLUMINOUS MATTER; PARTICLES; POTENTIALS; SIGNALS; SPACE; TEV RANGE 10-100