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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/86308
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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 |
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1844613328325836800 |
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13.070432 |