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arXiv · 1909.04584

Wino potential and Sommerfeld effect at NLO

Martin Beneke·Robert Szafron·Kai Urban
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Abstract

We calculate the SU(2)$\times$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 $χ^0$. We find sizeable modifications of the $χ^0χ^0$ annihilation cross section and determine the shifts of the resonance locations due to the loop correction to the wino potential.

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Martin Beneke, Robert Szafron, Kai Urban. 2019-09-10. Wino potential and Sommerfeld effect at NLO. https://doi.org/10.1016/j.physletb.2019.135112

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