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 m...

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Detalles Bibliográficos
Autores principales: Ciafaloni, Paolo, Comelli, Denis, De Simone, Andrea, Morgante, Enrico, Riotto, Antonio, Urbano, Alfredo
Lenguaje:eng
Publicado: 2013
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2013/10/031
http://cds.cern.ch/record/1551573
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author Ciafaloni, Paolo
Comelli, Denis
De Simone, Andrea
Morgante, Enrico
Riotto, Antonio
Urbano, Alfredo
author_facet Ciafaloni, Paolo
Comelli, Denis
De Simone, Andrea
Morgante, Enrico
Riotto, Antonio
Urbano, Alfredo
author_sort Ciafaloni, Paolo
collection CERN
description 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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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-15515732023-10-04T06:56:15Zdoi:10.1088/1475-7516/2013/10/031http://cds.cern.ch/record/1551573engCiafaloni, PaoloComelli, DenisDe Simone, AndreaMorgante, EnricoRiotto, AntonioUrbano, AlfredoThe Role of Electroweak Corrections for the Dark Matter Relic AbundanceParticle Physics - PhenomenologyWe 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.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 thecross sections computed with only virtual W exchange.Our results show that the inclusion of infrared logs is necessary for a precisecomputation of 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.arXiv:1305.6391CERN-PH-TH-2013-108SISSA-23-2013-FISICERN-PH-TH-2013-108SISSA 23-2013-FISIoai:cds.cern.ch:15515732013-05-28
spellingShingle Particle Physics - Phenomenology
Ciafaloni, Paolo
Comelli, Denis
De Simone, Andrea
Morgante, Enrico
Riotto, Antonio
Urbano, Alfredo
The Role of Electroweak Corrections for the Dark Matter Relic Abundance
title The Role of Electroweak Corrections for the Dark Matter Relic Abundance
title_full The Role of Electroweak Corrections for the Dark Matter Relic Abundance
title_fullStr The Role of Electroweak Corrections for the Dark Matter Relic Abundance
title_full_unstemmed The Role of Electroweak Corrections for the Dark Matter Relic Abundance
title_short The Role of Electroweak Corrections for the Dark Matter Relic Abundance
title_sort role of electroweak corrections for the dark matter relic abundance
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1475-7516/2013/10/031
http://cds.cern.ch/record/1551573
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