title: Gamma rays from heavy neutralino dark matter.
abstract: We consider the gamma-ray spectrum from neutralino dark matter annihilations and show that internal bremsstrahlung of pair final states gives a previously neglected source of photons at energies near the mass of the neutralino. For masses larger than about 1 TeV, and for present day detector resolutions, this results in a characteristic signal that may dominate not only over the continuous spectrum from W fragmentation, but also over the gammagamma and gammaZ line signals which are known to give large rates for heavy neutralinos. Observational prospects thus seem promising.
authors.affiliation: Department of Physics, Stockholm University, AlbaNova University Center, SE - 106 91 Stockholm, Sweden. lbe@physto.se
authors.forename: Lars
authors.initials: L
authors.lastname: Bergström
authors.forename: Torsten
authors.initials: T
authors.lastname: Bringmann
authors.forename: Martin
authors.initials: M
authors.lastname: Eriksson
authors.forename: Michael
authors.initials: M
authors.lastname: Gustafsson