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On the hadronic contribution to sterile neutrino production

Sterile neutrinos with masses in the keV range are considered to be a viable candidate for warm dark matter. The rate of their production through active-sterile neutrino transitions peaks, however, at temperatures of the order of the QCD scale, which makes it difficult to estimate their relic abunda...

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Detalles Bibliográficos
Autores principales: Asaka, T, Laine, Mikko, Shaposhnikov, M E
Lenguaje:eng
Publicado: 2006
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2006/06/053
http://cds.cern.ch/record/952020
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author Asaka, T
Laine, Mikko
Shaposhnikov, M E
author_facet Asaka, T
Laine, Mikko
Shaposhnikov, M E
author_sort Asaka, T
collection CERN
description Sterile neutrinos with masses in the keV range are considered to be a viable candidate for warm dark matter. The rate of their production through active-sterile neutrino transitions peaks, however, at temperatures of the order of the QCD scale, which makes it difficult to estimate their relic abundance quantitatively, even if the mass of the sterile neutrino and its mixing angle were known. We derive here a relation, valid to all orders in the strong coupling constant, which expresses the production rate in terms of the spectral function associated with active neutrinos. The latter can in turn be expressed as a certain convolution of the spectral functions related to various mesonic current-current correlation functions, which are being actively studied in other physics contexts. In the naive weak coupling limit, the appropriate Boltzmann equations can be derived from our general formulae.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-9520202019-09-30T06:29:59Zdoi:10.1088/1126-6708/2006/06/053http://cds.cern.ch/record/952020engAsaka, TLaine, MikkoShaposhnikov, M EOn the hadronic contribution to sterile neutrino productionParticle Physics - PhenomenologySterile neutrinos with masses in the keV range are considered to be a viable candidate for warm dark matter. The rate of their production through active-sterile neutrino transitions peaks, however, at temperatures of the order of the QCD scale, which makes it difficult to estimate their relic abundance quantitatively, even if the mass of the sterile neutrino and its mixing angle were known. We derive here a relation, valid to all orders in the strong coupling constant, which expresses the production rate in terms of the spectral function associated with active neutrinos. The latter can in turn be expressed as a certain convolution of the spectral functions related to various mesonic current-current correlation functions, which are being actively studied in other physics contexts. In the naive weak coupling limit, the appropriate Boltzmann equations can be derived from our general formulae.hep-ph/0605209CERN-PH-TH-2006-085oai:cds.cern.ch:9520202006-05-19
spellingShingle Particle Physics - Phenomenology
Asaka, T
Laine, Mikko
Shaposhnikov, M E
On the hadronic contribution to sterile neutrino production
title On the hadronic contribution to sterile neutrino production
title_full On the hadronic contribution to sterile neutrino production
title_fullStr On the hadronic contribution to sterile neutrino production
title_full_unstemmed On the hadronic contribution to sterile neutrino production
title_short On the hadronic contribution to sterile neutrino production
title_sort on the hadronic contribution to sterile neutrino production
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1126-6708/2006/06/053
http://cds.cern.ch/record/952020
work_keys_str_mv AT asakat onthehadroniccontributiontosterileneutrinoproduction
AT lainemikko onthehadroniccontributiontosterileneutrinoproduction
AT shaposhnikovme onthehadroniccontributiontosterileneutrinoproduction