Abstract
The Sommerfeld enhancement plays an important role in dark matter (DM) physics, and can significantly enhance the annihilation cross section of non-relativistic DM particles. In this paper, we study the effect of neutrino forces, which are generated by the exchange of a pair of light neutrinos, on the Sommerfeld enhancement. We demonstrate that in certain cases, a neutrino force can cause a significant correction to the Sommerfeld enhancement. Models that can realise DM-neutrino interactions and sizeable Sommerfeld enhancement are also briefly discussed, together with the impacts on DM phenomenology of neutrino forces.
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Coy, R., Xu, XJ. & Yu, B. Neutrino forces and the Sommerfeld enhancement. J. High Energ. Phys. 2022, 93 (2022). https://doi.org/10.1007/JHEP06(2022)093
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DOI: https://doi.org/10.1007/JHEP06(2022)093