Weak corrections to Minimal Dark Matter annihilations
arXiv:2606.18335
Abstract
We compute the one-loop weak corrections to the annihilation cross sections of fermionic Minimal Dark Matter multiplets. Infrared divergences cancel in the dominant -wave combination relevant for the thermal relic abundance. Instead, infrared-enhanced corrections affect velocity-suppressed rates, through a Sudakov/Sommerfeld interplay. The corrections grow with the multiplet size and are at the level in the most motivated cases: the Higgsino-like doublet, the wino-like triplet, the stable quintuplet.
21 pages, 2 figures. Webinar presentation: https://youtu.be/NB_JTYOmZG8