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Title: 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){sub 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.
Authors:
 [1] ;  [2] ;  [3] ; ;  [4] ;  [5]
  1. Dipartimento di Fisica, Università di Lecce and INFN - Sezione di Lecce, Via per Arnesano, I-73100 Lecce (Italy)
  2. INFN - Sezione di Ferrara, Via Saragat 3, I-44100 Ferrara (Italy)
  3. CERN, PH-TH Division, CH-1211, Genève 23 (Switzerland)
  4. Département de Physique Théorique and Centre for Astroparticle Physics (CAP), 24 quai E. Ansermet, CH-1211 Genève (Switzerland)
  5. SISSA, Via Bonomea 265, I-34136 Trieste (Italy)
Publication Date:
OSTI Identifier:
22282625
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; CALCULATION METHODS; CORRECTIONS; CROSS SECTIONS; INFRARED DIVERGENCES; NONLUMINOUS MATTER; SU-2 GROUPS; UNIVERSE