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arXiv · 1805.07367

Energetic $\gamma$-rays from TeV scale dark matter annihilation resummed

M. Beneke·A. Broggio·C. Hasner·M. Vollmann
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Abstract

The annihilation cross section of TeV scale dark matter particles $\chi^0$ 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 $\chi^0\chi^0\to \gamma+X$ in the vicinity of the maximal photon energy $E_\gamma = m_\chi$ 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 $\gamma$-ray telescopes with photon energy resolution of parametric order $m_W^2/m_\chi$ for photons with TeV energies.

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M. Beneke, A. Broggio, C. Hasner, M. Vollmann. 2018-05-18. Energetic $\gamma$-rays from TeV scale dark matter annihilation resummed. https://doi.org/10.1016/j.physletb.2018.10.008

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