Energetic γrays from TeV scale dark matter annihilation resummed
Abstract
The annihilation cross section of TeV scale dark matter particles χ^{0} with electroweak charges into photons is affected by large quantum corrections due to Sudakov logarithms and the Sommerfeld effect. We calculate the semiinclusive photon energy spectrum in χ^{0}χ^{0} → γ + X in the vicinity of the maximal photon energy E_{γ} =m_{χ} with NLL' accuracy in an allorder summation of the electroweak perturbative expansion adopting the pure wino model. This results in the most precise theoretical prediction of the annihilation rate for γray telescopes with photon energy resolution of parametric order m_{W}^{2} /m_{χ} for photons with TeV energies.
 Publication:

Physics Letters B
 Pub Date:
 November 2018
 DOI:
 10.1016/j.physletb.2018.10.008
 arXiv:
 arXiv:1805.07367
 Bibcode:
 2018PhLB..786..347B
 Keywords:

 High Energy Physics  Phenomenology;
 Astrophysics  High Energy Astrophysical Phenomena
 EPrint:
 16 pages, v2: corrections implemented as detailed in Erratum: Phys.Lett.B 810, 135831 (2020)