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arXiv · 1305.6391

The Role of Electroweak Corrections for the Dark Matter Relic Abundance

Paolo Ciafaloni·Denis Comelli·Andrea De Simone·Enrico Morgante·Antonio Riotto·Alfredo Urbano
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Abstract

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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Paolo Ciafaloni, Denis Comelli, Andrea De Simone, Enrico Morgante, Antonio Riotto, Alfredo Urbano. 2013-10-30. The Role of Electroweak Corrections for the Dark Matter Relic Abundance. https://doi.org/10.1088/1475-7516%2F2013%2F10%2F031

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