Abstract
The annihilation cross section of weakly interacting TeV scale dark matter particles χ0 into photons is affected by large quantum corrections due to electroweak Sudakov logarithms and the Sommerfeld effect. We extend our previous work on the resummation of the semi-inclusive photon energy spectrum in χ0χ0 → γ + X in the vicinity of the maximal photon energy Eγ = mχ with NLL’ accuracy from the case of narrow photon energy resolution \( {E}_{\mathrm{res}}^{\gamma } \) of order \( {m}_W^2/{m}_{\chi } \) to intermediate resolution of order \( {E}_{\mathrm{res}}^{\gamma}\sim {m}_W \) . We also provide details on the previous narrow resolution calculation. The two calculations, performed in different effective field theory set-ups for the wino dark matter model, are then shown to match well, providing an accurate representation up to energy resolutions of about 300 GeV.
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21 July 2020
An Erratum to this paper has been published: https://doi.org/10.1007/JHEP07(2020)145
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Beneke, M., Broggio, A., Hasner, C. et al. Resummed photon spectrum from dark matter annihilation for intermediate and narrow energy resolution. J. High Energ. Phys. 2019, 103 (2019). https://doi.org/10.1007/JHEP08(2019)103
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DOI: https://doi.org/10.1007/JHEP08(2019)103