About
We compute the one-loop electroweak corrections to coannihilation cross sections for fermionic Minimal Dark Matter multiplets. For the inclusive combination governing thermal freeze-out, real and virtual infrared singularities cancel in the s-wave limit. Nevertheless, sizable finite electroweak corrections remain. They increase with the size of the electroweak multiplet and reach the few-percent level for the phenomenologically most relevant cases: the Higgsino-like doublet, the wino-like triplet, and the stable quintuplet. We further show that infrared-enhanced terms survive in velocity-suppressed rates through an interplay between Sudakov radiation and Sommerfeld enhancement, although these channels are numerically subdominant during freeze-out.
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The talk
Credits and licence
- Institution
- CERN
- Speaker
- Mateusz Duch
- Year
- 2026
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
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