Constraints on heavy dark matter annihilation and decay from electron and positron cosmic ray spectra

Gamma Ray Spectra from Dark Matter Annihilation and Decay

In this paper, we study gamma ray spectra for various scenarios of dark matter annihilation and decay. We focus on processes which generate only high-energy photons or leptons and photons, but no proton-antiproton pairs, to be compatible with PAMELA’s data. We investigate photons produced directly from two-body decay chains and photons produced together with charged particles. For the former ca...

New limits on dark matter annihilation from AMS cosmic ray positron data

New limits on dark matter annihilation from Alpha Magnetic Spectrometer cosmic ray positron data.

The Alpha Magnetic Spectrometer experiment onboard the International Space Station has recently provided cosmic ray electron and positron data with unprecedented precision in the range from 0.5 to 350 GeV. The observed rise in the positron fraction at energies above 10 GeV remains unexplained, with proposed solutions ranging from local pulsars to TeV-scale dark matter. Here, we make use of this...

Supplemental Material to ‘New limits on dark matter annihilation from AMS cosmic ray positron data’

Lars Bergström, Torsten Bringmann, Ilias Cholis, Dan Hooper, 4 and Christoph Weniger The Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden II. Institute for Theoretical Physics, University of Hamburg, Luruper Chausse 149, DE-22761 Hamburg, Germany Center for Particle Astrophysics, Fermi National Accelerator Laborator...

Cosmic gamma-ray background from dark matter annihilation

High-energy photons from pair annihilation of dark matter particles contribute to the cosmic gamma-ray background (CGB) observed in a wide energy range. The precise shape of the energy spectrum of CGB depends on the nature of dark matter particles. In order to discriminate between the signals from dark matter annihilation and other astrophysical sources, however, the information from the energy...