On the full Boltzmann equations for leptogenesis

We consider the full Boltzmann equations for standard and soft leptogenesis, instead of the usual integrated Boltzmann equations which assume kinetic equilibrium for all species. Decays and inverse decays may be inefficient for thermalising the heavy-(s)neutrino distribution function, leading to sig...

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Detalles Bibliográficos
Autores: Garayoa, Julia, Pastor Carpi, Sergio, Pinto Cejas, Teguayco, Rius, Nuria, Vives, Óscar
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/20751
Acceso en línea:http://hdl.handle.net/10261/20751
Access Level:acceso abierto
Palabra clave:leptogenesis
Neutrino theory
Physics of the early universe
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spelling On the full Boltzmann equations for leptogenesisGarayoa, JuliaPastor Carpi, SergioPinto Cejas, TeguaycoRius, NuriaVives, ÓscarleptogenesisNeutrino theoryPhysics of the early universeWe consider the full Boltzmann equations for standard and soft leptogenesis, instead of the usual integrated Boltzmann equations which assume kinetic equilibrium for all species. Decays and inverse decays may be inefficient for thermalising the heavy-(s)neutrino distribution function, leading to significant deviations from kinetic equilibrium. We analyse the impact of using the full kinetic equations in the case of a previously generated lepton asymmetry, and find that the washout of this initial asymmetry due to the interactions of the right-handed neutrino is larger than when calculated via the integrated equations. We also solve the full Boltzmann equations for soft leptogenesis, where the lepton asymmetry induced by the soft SUSY-breaking terms in sneutrino decays is a purely thermal effect, since at T=0 the asymmetry in leptons cancels the one in sleptons. In this case, we obtain that in the weak washout regime (K ~< 1) the final lepton asymmetry can change up to a factor four with respect to previous estimates.Peer reviewedInstitute of Physics Publishing201020102009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501415806 bytesapplication/pdfhttp://hdl.handle.net/10261/20751reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1088/1475-7516/2009/09/035info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/207512026-05-22T06:33:51Z
dc.title.none.fl_str_mv On the full Boltzmann equations for leptogenesis
title On the full Boltzmann equations for leptogenesis
spellingShingle On the full Boltzmann equations for leptogenesis
Garayoa, Julia
leptogenesis
Neutrino theory
Physics of the early universe
title_short On the full Boltzmann equations for leptogenesis
title_full On the full Boltzmann equations for leptogenesis
title_fullStr On the full Boltzmann equations for leptogenesis
title_full_unstemmed On the full Boltzmann equations for leptogenesis
title_sort On the full Boltzmann equations for leptogenesis
dc.creator.none.fl_str_mv Garayoa, Julia
Pastor Carpi, Sergio
Pinto Cejas, Teguayco
Rius, Nuria
Vives, Óscar
author Garayoa, Julia
author_facet Garayoa, Julia
Pastor Carpi, Sergio
Pinto Cejas, Teguayco
Rius, Nuria
Vives, Óscar
author_role author
author2 Pastor Carpi, Sergio
Pinto Cejas, Teguayco
Rius, Nuria
Vives, Óscar
author2_role author
author
author
author
dc.subject.none.fl_str_mv leptogenesis
Neutrino theory
Physics of the early universe
topic leptogenesis
Neutrino theory
Physics of the early universe
description We consider the full Boltzmann equations for standard and soft leptogenesis, instead of the usual integrated Boltzmann equations which assume kinetic equilibrium for all species. Decays and inverse decays may be inefficient for thermalising the heavy-(s)neutrino distribution function, leading to significant deviations from kinetic equilibrium. We analyse the impact of using the full kinetic equations in the case of a previously generated lepton asymmetry, and find that the washout of this initial asymmetry due to the interactions of the right-handed neutrino is larger than when calculated via the integrated equations. We also solve the full Boltzmann equations for soft leptogenesis, where the lepton asymmetry induced by the soft SUSY-breaking terms in sneutrino decays is a purely thermal effect, since at T=0 the asymmetry in leptons cancels the one in sleptons. In this case, we obtain that in the weak washout regime (K ~< 1) the final lepton asymmetry can change up to a factor four with respect to previous estimates.
publishDate 2009
dc.date.none.fl_str_mv 2009
2010
2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/20751
url http://hdl.handle.net/10261/20751
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1088/1475-7516/2009/09/035
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 415806 bytes
application/pdf
dc.publisher.none.fl_str_mv Institute of Physics Publishing
publisher.none.fl_str_mv Institute of Physics Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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