The Role of Electroweak Corrections for the Dark Matter Relic Abundance

Journal Article · Tue Oct 01 00:00:00 EDT 2013 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2013/10/031· OSTI ID:22282625

Ciafaloni, Paolo ^[1]; Comelli, Denis ^[2]; Simone, Andrea De ^[3]; Morgante, Enrico; Riotto, Antonio ^[4]; Urbano, Alfredo ^[5]

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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)

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.

• OSTI ID: 22282625
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ANNIHILATION
CALCULATION METHODS
CORRECTIONS
CROSS SECTIONS
INFRARED DIVERGENCES
NONLUMINOUS MATTER
SU-2 GROUPS
UNIVERSE