MeV dark matter: has it been detected?
We discuss the possibility that the recent detection of 511 keV gamma rays from the galactic bulge, as observed by INTEGRAL, is a consequence of low mass (1-100 MeV) particle dark matter annihilations. We discuss the type of halo profile favored by the observations as well as the size of the annihilation cross section needed to account for the signal. We find that such a scenario is consistent with the observed dark matter relic density and other constraints from astrophysics and particle physics.
Boehm
Céline
C
Denys Wilkinson Laboratory, Astrophysics Department, Oxford University, OX1 3RH Oxford, United Kingdom.
Hooper
Dan
D
Silk
Joseph
J
Casse
Michel
M
Paul
Jacques
J