Wino potential and Sommerfeld effect at NLO

Martin Beneke, Robert Szafron, Kai Urban

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We calculate the SU(2)×U(1) electroweak static potential between a fermionic triplet in the broken phase of the Standard Model in the one-loop order (NLO). The one-loop correction provides the leading non-relativistic correction to the large Sommerfeld effect in the annihilation of wino or wino-like dark matter particles χ0. We find sizeable modifications of the χ0χ0 annihilation cross section and determine the shifts of the resonance locations due to the loop correction to the wino potential.

Original languageEnglish
Article number135112
JournalPhysics Letters B
StatePublished - 10 Jan 2020


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