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The Role of Electroweak Corrections for the Dark Matter Relic Abundance

We analyze the validity of the theorems concerning the cancellation of the infrared and collinar divergences in the case of dark matter freeze-out in the early universe. In particular, we compute the electroweak logarithmic corrections of infrared origin to the annihilation cross section of a dark matter particle being the neutral component of a SU(2)_L multiplet. The inclusion of processes with final state W can modify significantly the cross sections computed with only virtual W exchange. Our results show that the inclusion of infrared logs is necessary for a precise computation of the dark matter relic abundance.

preprint2013arXivOpen access
Paolo CiafaloniDenis ComelliAndrea De SimoneEnrico MorganteAntonio RiottoAlfredo Urbano
astro-ph.COhep-ph
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Paolo CiafaloniDenis ComelliAndrea De SimoneEnrico MorganteAntonio RiottoAlfredo Urbano

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