Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms

Detalhes bibliográficos
Autor(a) principal: Gago, A. M.
Data de Publicação: 2002
Outros Autores: Guzzo, M. M., de Holanda, P. C., Nunokawa, H., Nunokawa, H. [UNESP], Peres, O. L., Pleitez, V. [UNESP], Zukanovich Funchal, R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1103/PhysRevD.65.073012
http://hdl.handle.net/11449/225119
Resumo: What can we learn from solar neutrino observations? Is there any solution to the solar neutrino anomaly which is favored by the present experimental panorama? After SNO results, is it possible to affirm that neutrinos have mass? In order to answer such questions we analyze the current available data from the solar neutrino experiments, including the recent SNO result, in view of many acceptable solutions to the solar neutrino problem based on different conversion mechanisms, for the first time using the same statistical procedure. This allows us to do a direct comparison of the goodness of the fit among different solutions, from which we can discuss and conclude on the current status of each proposed dynamical mechanism. These solutions are based on different assumptions: (a) neutrino mass and mixing, (b) a nonvanishing neutrino magnetic moment, (c) the existence of nonstandard flavor-changing and nonuniversal neutrino interactions, and (d) a tiny violation of the equivalence principle. We investigate the quality of the fit provided by each one of these solutions not only to the total rate measured by all the solar neutrino experiments but also to the recoil electron energy spectrum measured at different zenith angles by the Super-Kamiokande Collaboration. We conclude that several nonstandard neutrino flavor conversion mechanisms provide a very good fit to the experimental data which is comparable with (or even slightly better than) the most famous solution to the solar neutrino anomaly based on the neutrino oscillation induced by mass.
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spelling Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanismsWhat can we learn from solar neutrino observations? Is there any solution to the solar neutrino anomaly which is favored by the present experimental panorama? After SNO results, is it possible to affirm that neutrinos have mass? In order to answer such questions we analyze the current available data from the solar neutrino experiments, including the recent SNO result, in view of many acceptable solutions to the solar neutrino problem based on different conversion mechanisms, for the first time using the same statistical procedure. This allows us to do a direct comparison of the goodness of the fit among different solutions, from which we can discuss and conclude on the current status of each proposed dynamical mechanism. These solutions are based on different assumptions: (a) neutrino mass and mixing, (b) a nonvanishing neutrino magnetic moment, (c) the existence of nonstandard flavor-changing and nonuniversal neutrino interactions, and (d) a tiny violation of the equivalence principle. We investigate the quality of the fit provided by each one of these solutions not only to the total rate measured by all the solar neutrino experiments but also to the recoil electron energy spectrum measured at different zenith angles by the Super-Kamiokande Collaboration. We conclude that several nonstandard neutrino flavor conversion mechanisms provide a very good fit to the experimental data which is comparable with (or even slightly better than) the most famous solution to the solar neutrino anomaly based on the neutrino oscillation induced by mass.Sección Física Departamento de Ciencias Pontificia Universidad Católica del Perú, Apartado 1761, LimaDepartment of Physics CA State University, Dominguez Hills, Carson, CA 90747Instituto de Física Universidade de São Paulo, Caixa Postal 66.318, 05315-970 São Paulo SPInstituto de Física Gleb Wataghin Universidade Estadual de Campinas–UNICAMP, 13083-970 Campinas SPThe Abdus Salam International Center for Theoretical Physics, I-34100 TriesteInstituto de Física Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo SPInstituto de Física Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 São Paulo SPPontificia Universidad Católica del PerúCA State UniversityUniversidade de São Paulo (USP)Universidade Estadual de Campinas (UNICAMP)The Abdus Salam International Center for Theoretical PhysicsUniversidade Estadual Paulista (UNESP)Gago, A. M.Guzzo, M. M.de Holanda, P. C.Nunokawa, H.Nunokawa, H. [UNESP]Peres, O. L.Pleitez, V. [UNESP]Zukanovich Funchal, R.2022-04-28T20:40:07Z2022-04-28T20:40:07Z2002-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article730121-7301210http://dx.doi.org/10.1103/PhysRevD.65.073012Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 65, n. 7A, p. 730121-7301210, 2002.0556-2821http://hdl.handle.net/11449/22511910.1103/PhysRevD.65.0730122-s2.0-4243313570Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review D - Particles, Fields, Gravitation and Cosmologyinfo:eu-repo/semantics/openAccess2022-04-28T20:40:07Zoai:repositorio.unesp.br:11449/225119Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:37:27.254903Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
title Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
spellingShingle Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
Gago, A. M.
title_short Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
title_full Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
title_fullStr Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
title_full_unstemmed Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
title_sort Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
author Gago, A. M.
author_facet Gago, A. M.
Guzzo, M. M.
de Holanda, P. C.
Nunokawa, H.
Nunokawa, H. [UNESP]
Peres, O. L.
Pleitez, V. [UNESP]
Zukanovich Funchal, R.
author_role author
author2 Guzzo, M. M.
de Holanda, P. C.
Nunokawa, H.
Nunokawa, H. [UNESP]
Peres, O. L.
Pleitez, V. [UNESP]
Zukanovich Funchal, R.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Pontificia Universidad Católica del Perú
CA State University
Universidade de São Paulo (USP)
Universidade Estadual de Campinas (UNICAMP)
The Abdus Salam International Center for Theoretical Physics
Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Gago, A. M.
Guzzo, M. M.
de Holanda, P. C.
Nunokawa, H.
Nunokawa, H. [UNESP]
Peres, O. L.
Pleitez, V. [UNESP]
Zukanovich Funchal, R.
description What can we learn from solar neutrino observations? Is there any solution to the solar neutrino anomaly which is favored by the present experimental panorama? After SNO results, is it possible to affirm that neutrinos have mass? In order to answer such questions we analyze the current available data from the solar neutrino experiments, including the recent SNO result, in view of many acceptable solutions to the solar neutrino problem based on different conversion mechanisms, for the first time using the same statistical procedure. This allows us to do a direct comparison of the goodness of the fit among different solutions, from which we can discuss and conclude on the current status of each proposed dynamical mechanism. These solutions are based on different assumptions: (a) neutrino mass and mixing, (b) a nonvanishing neutrino magnetic moment, (c) the existence of nonstandard flavor-changing and nonuniversal neutrino interactions, and (d) a tiny violation of the equivalence principle. We investigate the quality of the fit provided by each one of these solutions not only to the total rate measured by all the solar neutrino experiments but also to the recoil electron energy spectrum measured at different zenith angles by the Super-Kamiokande Collaboration. We conclude that several nonstandard neutrino flavor conversion mechanisms provide a very good fit to the experimental data which is comparable with (or even slightly better than) the most famous solution to the solar neutrino anomaly based on the neutrino oscillation induced by mass.
publishDate 2002
dc.date.none.fl_str_mv 2002-04-01
2022-04-28T20:40:07Z
2022-04-28T20:40:07Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1103/PhysRevD.65.073012
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 65, n. 7A, p. 730121-7301210, 2002.
0556-2821
http://hdl.handle.net/11449/225119
10.1103/PhysRevD.65.073012
2-s2.0-4243313570
url http://dx.doi.org/10.1103/PhysRevD.65.073012
http://hdl.handle.net/11449/225119
identifier_str_mv Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 65, n. 7A, p. 730121-7301210, 2002.
0556-2821
10.1103/PhysRevD.65.073012
2-s2.0-4243313570
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Physical Review D - Particles, Fields, Gravitation and Cosmology
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 730121-7301210
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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