Loop-induced dark matter direct detection signals from gamma-ray lines

Mads Toudal Frandsen, Ulrich Haisch, Felix Kahlhoefer, Philipp Mertsch, Kai Schmidt-Hoberg

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review


Improved limits as well as tentative claims for dark matter annihilation into gamma-ray lines have been presented recently. We study the direct detection cross section induced from dark matter annihilation into two photons in a model-independent fashion, assuming no additional couplings between dark matter and nuclei. We find a striking non-standard recoil spectrum due to different destructively interfering contributions to the dark matter nucleus scattering cross section. While in the case of s-wave annihilation the current sensitivity of direct detection experiments is insufficient to compete with indirect detection searches, for p-wave annihilation the constraints from direct searches are comparable. This will allow to test dark matter scenarios with p-wave annihilation that predict a large di-photon annihilation cross section in the next generation of experiments.
TidsskriftJournal of Cosmology and Astroparticle Physics
Sider (fra-til)033
StatusUdgivet - 2012


  • hep-ph
  • astro-ph.CO