Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction

Autores
Saez, M. M.; Civitarese, Enrique Osvaldo; Mosquera, Mercedes Elisa
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Neutrino-induced reactions are a basic ingredient in astrophysical processes like star evolution. The existence of neutrino oscillations affects the rate of nuclear electroweak decays which participates in the chain of events that determines the fate of the star. Among the processes of interest, the production of heavy elements in core-collapse supernovae is strongly dependent upon neutrino properties, like the mixing between different species of neutrinos. In this work, we study the effects of neutrino oscillations upon the electron fraction as a function of the neutrino mixing parameters, for two schemes: the 1+1-scheme (one active neutrino and one sterile neutrino) and the 2+1-scheme (two active neutrinos and one sterile neutrino). We have performed this analysis considering a core-collapse supernovae and determined the physical conditions needed to activate the nuclear reaction chains involved in the r-process. We found that the interactions of the neutrinos with matter and among themselves and the initial amount of sterile neutrinos in the neutrino-sphere might change the electron fraction, therefore affecting the onset of the r-process. We have set constrains on the active-sterile neutrino mixing parameters. They are the square-mass-difference ∆m^2_14 , the mixing angle sin^2(2θ_14), and the hindrance factor Xi_s for the occupation of sterile neutrinos. The calculations have been performed for different values of X_alpha, which is the fraction of alpha particles. For X_alpha=0 the r-process is taking place if ∆m^2_14 ≥ 2 eV^2 , sin^2(2θ_14) < 0.8 and Xi_s < 0.5. For larger values of X_alpha the region of parameters is strongly reduced. The present results are compared to results available in the literature.
Fil: Saez, M. M.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Civitarese, Enrique Osvaldo. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Mosquera, Mercedes Elisa. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
STERILE NEUTRINO
SUPERNOVA
R-PROCESS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/86308

id CONICETDig_bf0033c905643be4a710c687035bd5bd
oai_identifier_str oai:ri.conicet.gov.ar:11336/86308
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fractionSaez, M. M.Civitarese, Enrique OsvaldoMosquera, Mercedes ElisaSTERILE NEUTRINOSUPERNOVAR-PROCESShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Neutrino-induced reactions are a basic ingredient in astrophysical processes like star evolution. The existence of neutrino oscillations affects the rate of nuclear electroweak decays which participates in the chain of events that determines the fate of the star. Among the processes of interest, the production of heavy elements in core-collapse supernovae is strongly dependent upon neutrino properties, like the mixing between different species of neutrinos. In this work, we study the effects of neutrino oscillations upon the electron fraction as a function of the neutrino mixing parameters, for two schemes: the 1+1-scheme (one active neutrino and one sterile neutrino) and the 2+1-scheme (two active neutrinos and one sterile neutrino). We have performed this analysis considering a core-collapse supernovae and determined the physical conditions needed to activate the nuclear reaction chains involved in the r-process. We found that the interactions of the neutrinos with matter and among themselves and the initial amount of sterile neutrinos in the neutrino-sphere might change the electron fraction, therefore affecting the onset of the r-process. We have set constrains on the active-sterile neutrino mixing parameters. They are the square-mass-difference ∆m^2_14 , the mixing angle sin^2(2θ_14), and the hindrance factor Xi_s for the occupation of sterile neutrinos. The calculations have been performed for different values of X_alpha, which is the fraction of alpha particles. For X_alpha=0 the r-process is taking place if ∆m^2_14 ≥ 2 eV^2 , sin^2(2θ_14) < 0.8 and Xi_s < 0.5. For larger values of X_alpha the region of parameters is strongly reduced. The present results are compared to results available in the literature.Fil: Saez, M. M.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Civitarese, Enrique Osvaldo. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Mosquera, Mercedes Elisa. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaWorld Scientific2018-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/86308Saez, M. M.; Civitarese, Enrique Osvaldo; Mosquera, Mercedes Elisa; Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction; World Scientific; International Journal of Modern Physics D; 27; 12; 7-2018; 1850116-18501330218-2718CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1142/S021827181850116Xinfo:eu-repo/semantics/altIdentifier/url/https://www.worldscientific.com/doi/10.1142/S021827181850116Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:42:08Zoai:ri.conicet.gov.ar:11336/86308instacron: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:34982025-09-29 09:42:08.873CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
title Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
spellingShingle Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
Saez, M. M.
STERILE NEUTRINO
SUPERNOVA
R-PROCESS
title_short Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
title_full Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
title_fullStr Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
title_full_unstemmed Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
title_sort Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction
dc.creator.none.fl_str_mv Saez, M. M.
Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
author Saez, M. M.
author_facet Saez, M. M.
Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
author_role author
author2 Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
author2_role author
author
dc.subject.none.fl_str_mv STERILE NEUTRINO
SUPERNOVA
R-PROCESS
topic STERILE NEUTRINO
SUPERNOVA
R-PROCESS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Neutrino-induced reactions are a basic ingredient in astrophysical processes like star evolution. The existence of neutrino oscillations affects the rate of nuclear electroweak decays which participates in the chain of events that determines the fate of the star. Among the processes of interest, the production of heavy elements in core-collapse supernovae is strongly dependent upon neutrino properties, like the mixing between different species of neutrinos. In this work, we study the effects of neutrino oscillations upon the electron fraction as a function of the neutrino mixing parameters, for two schemes: the 1+1-scheme (one active neutrino and one sterile neutrino) and the 2+1-scheme (two active neutrinos and one sterile neutrino). We have performed this analysis considering a core-collapse supernovae and determined the physical conditions needed to activate the nuclear reaction chains involved in the r-process. We found that the interactions of the neutrinos with matter and among themselves and the initial amount of sterile neutrinos in the neutrino-sphere might change the electron fraction, therefore affecting the onset of the r-process. We have set constrains on the active-sterile neutrino mixing parameters. They are the square-mass-difference ∆m^2_14 , the mixing angle sin^2(2θ_14), and the hindrance factor Xi_s for the occupation of sterile neutrinos. The calculations have been performed for different values of X_alpha, which is the fraction of alpha particles. For X_alpha=0 the r-process is taking place if ∆m^2_14 ≥ 2 eV^2 , sin^2(2θ_14) < 0.8 and Xi_s < 0.5. For larger values of X_alpha the region of parameters is strongly reduced. The present results are compared to results available in the literature.
Fil: Saez, M. M.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Civitarese, Enrique Osvaldo. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Mosquera, Mercedes Elisa. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Neutrino-induced reactions are a basic ingredient in astrophysical processes like star evolution. The existence of neutrino oscillations affects the rate of nuclear electroweak decays which participates in the chain of events that determines the fate of the star. Among the processes of interest, the production of heavy elements in core-collapse supernovae is strongly dependent upon neutrino properties, like the mixing between different species of neutrinos. In this work, we study the effects of neutrino oscillations upon the electron fraction as a function of the neutrino mixing parameters, for two schemes: the 1+1-scheme (one active neutrino and one sterile neutrino) and the 2+1-scheme (two active neutrinos and one sterile neutrino). We have performed this analysis considering a core-collapse supernovae and determined the physical conditions needed to activate the nuclear reaction chains involved in the r-process. We found that the interactions of the neutrinos with matter and among themselves and the initial amount of sterile neutrinos in the neutrino-sphere might change the electron fraction, therefore affecting the onset of the r-process. We have set constrains on the active-sterile neutrino mixing parameters. They are the square-mass-difference ∆m^2_14 , the mixing angle sin^2(2θ_14), and the hindrance factor Xi_s for the occupation of sterile neutrinos. The calculations have been performed for different values of X_alpha, which is the fraction of alpha particles. For X_alpha=0 the r-process is taking place if ∆m^2_14 ≥ 2 eV^2 , sin^2(2θ_14) < 0.8 and Xi_s < 0.5. For larger values of X_alpha the region of parameters is strongly reduced. The present results are compared to results available in the literature.
publishDate 2018
dc.date.none.fl_str_mv 2018-07
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/11336/86308
Saez, M. M.; Civitarese, Enrique Osvaldo; Mosquera, Mercedes Elisa; Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction; World Scientific; International Journal of Modern Physics D; 27; 12; 7-2018; 1850116-1850133
0218-2718
CONICET Digital
CONICET
url http://hdl.handle.net/11336/86308
identifier_str_mv Saez, M. M.; Civitarese, Enrique Osvaldo; Mosquera, Mercedes Elisa; Neutrino-induced reactions in core-collapse supernovae: Effects on the electron fraction; World Scientific; International Journal of Modern Physics D; 27; 12; 7-2018; 1850116-1850133
0218-2718
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1142/S021827181850116X
info:eu-repo/semantics/altIdentifier/url/https://www.worldscientific.com/doi/10.1142/S021827181850116X
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv World Scientific
publisher.none.fl_str_mv World Scientific
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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_ 1844613328325836800
score 13.070432