## 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 semi-inclusive 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 all-order summation of the electroweak perturbative expansion adopting the pure wino model. This results in the most precise theoretical prediction of the annihilation rate for γ-ray telescopes with photon energy resolution of parametric order m_{W} ^{2}/m_{χ} for photons with TeV energies.

Original language | English |
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Pages (from-to) | 347-354 |

Number of pages | 8 |

Journal | Physics Letters B |

Volume | 786 |

DOIs | |

State | Published - 10 Nov 2018 |