title: MeV dark matter: has it been detected?
abstract: 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.
authors.affiliation: Denys Wilkinson Laboratory, Astrophysics Department, Oxford University, OX1 3RH Oxford, United Kingdom.
authors.forename: Céline
authors.initials: C
authors.lastname: Boehm
authors.forename: Dan
authors.initials: D
authors.lastname: Hooper
authors.forename: Joseph
authors.initials: J
authors.lastname: Silk
authors.forename: Michel
authors.initials: M
authors.lastname: Casse
authors.forename: Jacques
authors.initials: J
authors.lastname: Paul