CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case

We extend to the highly degenerate case a recent approach for analyzing the sources of CP violation in baryogenesis models with quasi-degenerate neutrinos. In this approach an expansion of the resummed propagator around the poles is plugged into a quantum field theory model of neutrino oscillations...

ver descrição completa

Detalhes bibliográficos
Autor: Racker, Juan Diego
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2021
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositório:CONICET Digital (CONICET)
Idioma:inglês
OAI Identifier:oai:ri.conicet.gov.ar:11336/170298
Acesso em linha:http://hdl.handle.net/11336/170298
Access Level:Acceso aberto
Palavra-chave:BEYOND STANDARD MODEL
COSMOLOGY OF THEORIES BEYOND THE SM
CP VIOLATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
id AR_a9d0a099a2ddf1bbdd19796e2b8a4f9a
oai_identifier_str oai:ri.conicet.gov.ar:11336/170298
network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate caseRacker, Juan DiegoBEYOND STANDARD MODELCOSMOLOGY OF THEORIES BEYOND THE SMCP VIOLATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We extend to the highly degenerate case a recent approach for analyzing the sources of CP violation in baryogenesis models with quasi-degenerate neutrinos. In this approach an expansion of the resummed propagator around the poles is plugged into a quantum field theory model of neutrino oscillations and a source term for the time evolution of the lepton asymmetry is built directly from the probabilities of lepton number violating processes involving only stable particles. This allows for a transparent consideration of unitarity requirements. The source term has contributions that can be identified with CP violation from mixing, oscillations and interference between both. For the highly degenerate case, i.e. when the mass difference between two neutrinos is similar or smaller than their decay widths, we find that in general the mixing and oscillation terms contribute with opposite signs to the generation of lepton asymmetry and the contribution of the interference term is typically very relevant and crucial to ensure unitarity is satisfied. Moreover, the expressions we obtain are finite in the double degenerate limit of equal masses and couplings. The calculations are done in a simple scalar toy model.Fil: Racker, Juan Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaSpringer2021-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/170298Racker, Juan Diego; CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case; Springer; Journal of High Energy Physics; 2021; 11; 11-2021; 1-141029-8479CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP11(2021)027info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/JHEP11(2021)027info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:39:48Zoai:ri.conicet.gov.ar:11336/170298instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:39:48.653CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
title CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
spellingShingle CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
Racker, Juan Diego
BEYOND STANDARD MODEL
COSMOLOGY OF THEORIES BEYOND THE SM
CP VIOLATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
title_full CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
title_fullStr CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
title_full_unstemmed CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
title_sort CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case
dc.creator.none.fl_str_mv Racker, Juan Diego
author Racker, Juan Diego
author_facet Racker, Juan Diego
author_role author
dc.subject.none.fl_str_mv BEYOND STANDARD MODEL
COSMOLOGY OF THEORIES BEYOND THE SM
CP VIOLATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic BEYOND STANDARD MODEL
COSMOLOGY OF THEORIES BEYOND THE SM
CP VIOLATION
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description We extend to the highly degenerate case a recent approach for analyzing the sources of CP violation in baryogenesis models with quasi-degenerate neutrinos. In this approach an expansion of the resummed propagator around the poles is plugged into a quantum field theory model of neutrino oscillations and a source term for the time evolution of the lepton asymmetry is built directly from the probabilities of lepton number violating processes involving only stable particles. This allows for a transparent consideration of unitarity requirements. The source term has contributions that can be identified with CP violation from mixing, oscillations and interference between both. For the highly degenerate case, i.e. when the mass difference between two neutrinos is similar or smaller than their decay widths, we find that in general the mixing and oscillation terms contribute with opposite signs to the generation of lepton asymmetry and the contribution of the interference term is typically very relevant and crucial to ensure unitarity is satisfied. Moreover, the expressions we obtain are finite in the double degenerate limit of equal masses and couplings. The calculations are done in a simple scalar toy model.
publishDate 2021
dc.date.none.fl_str_mv 2021-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/170298
Racker, Juan Diego; CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case; Springer; Journal of High Energy Physics; 2021; 11; 11-2021; 1-14
1029-8479
CONICET Digital
CONICET
url http://hdl.handle.net/11336/170298
identifier_str_mv Racker, Juan Diego; CP violation in mixing and oscillations for leptogenesis: Part II. The highly degenerate case; Springer; Journal of High Energy Physics; 2021; 11; 11-2021; 1-14
1029-8479
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/JHEP11(2021)027
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/JHEP11(2021)027
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1799194950716358656
score 15.812429

Registros relacionados