Abstract
The impact of electroweak Sudakov logarithms on the endpoint of the photon spectrum for wino dark matter annihilation was studied intensively over the last several years. In this work, we extend these results to Higgsino dark matter \( {\chi}_1^0 \). We achieve NLL′ resummation accuracy for narrow and intermediate spectral energy resolutions, of order \( {m}_W^2/{m}_{\chi } \) and mW, respectively. This is the most accurate prediction to date for the yield of high-energy γ-rays from \( {\chi}_1^0{\chi}_1^0 \) → γ + X annihilation for the energy resolutions realized by current and next-generation telescopes. We also discuss for the first time the effect of power corrections in mW/mχ in this context and argue why they are not sizeable.
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Beneke, M., Hasner, C., Urban, K. et al. Precise yield of high-energy photons from Higgsino dark matter annihilation. J. High Energ. Phys. 2020, 30 (2020). https://doi.org/10.1007/JHEP03(2020)030
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DOI: https://doi.org/10.1007/JHEP03(2020)030