Extended gamma-ray emission from Coy Dark Matter

Understand

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.