Global analysis of the post-SNO solar neutrino data for standard and nonstandard oscillation mechanisms
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , , , , |
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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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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1808129097409232896 |