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arXiv · 2211.14341

Electroweak resummation of neutralino dark-matter annihilation into high-energy photons

Martin Beneke·Stefan Lederer·Clara Peset
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Abstract

We consider the resummation of large electroweak Sudakov logarithms for the annihilation of neutralino DM with $\mathcal{O}$(TeV) mass to high-energy photons in the minimal supersymmetric standard model, extending previous work on the minimal wino and Higgsino models. We find that NLL resummation reduces the yield of photons by about $20\%$ for Higgsino-dominated DM at masses around 1~TeV, and up to $45\%$ for neutralinos with larger wino admixture at heavier masses near 3~TeV. This sizable effect is relevant when observations or exclusion limits are translated into MSSM parameter-space constraints.

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Martin Beneke, Stefan Lederer, Clara Peset. 2022-11-25. Electroweak resummation of neutralino dark-matter annihilation into high-energy photons. https://doi.org/10.1007/jhep01(2023)171

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