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arxiv: 1305.6391 · v2 · pith:Z6XRZPMAnew · submitted 2013-05-28 · ✦ hep-ph · astro-ph.CO

The Role of Electroweak Corrections for the Dark Matter Relic Abundance

Paolo Ciafaloni , Denis Comelli , Andrea De Simone , Enrico Morgante , Antonio Riotto , Alfredo Urbano This is my paper
classification ✦ hep-ph astro-ph.CO
keywords darkmatterinfraredabundancecorrectionscrosselectroweakinclusion
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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.

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