Decoherence in supernova neutrino transformations suppressed by deleptonization

16 pages, 12 figures.-- PACS nrs.: 14.60.Pq; 97.60.Bw.-- ISI Article Identifier: 000251987300100.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.2498

Detalles Bibliográficos
Autores: Esteban-Pretel, Andreu, Pastor Carpi, Sergio, Tomàs, Ricard, Raffelt, Georg G., Sigl, Günter
Tipo de recurso: artículo
Fecha de publicación:2007
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/9058
Acceso en línea:http://hdl.handle.net/10261/9058
Access Level:acceso abierto
Palabra clave:Early Universe
[PACS] Neutrino mass and mixing
[PACS] Supernovae
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spelling Decoherence in supernova neutrino transformations suppressed by deleptonizationEsteban-Pretel, AndreuPastor Carpi, SergioTomàs, RicardRaffelt, Georg G.Sigl, GünterEarly Universe[PACS] Neutrino mass and mixing[PACS] Supernovae16 pages, 12 figures.-- PACS nrs.: 14.60.Pq; 97.60.Bw.-- ISI Article Identifier: 000251987300100.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.2498In the dense-neutrino region at 50-400 km above the neutrino sphere in a supernova, neutrino-neutrino interactions cause large flavor transformations. We study when the multiangle nature of the neutrino trajectories leads to flavor decoherence between different angular modes. We consider a two-flavor mixing scenario between nu(e) and another flavor nu(x) and assume the usual hierarchy F-nu e > F-[overline nu][sub e] > F-nu x = F-[overline nu][sub x] for the number fluxes. We define epsilon = (F-nu e - F-[overline nu][sub e])/(F-[overline nu][sub e] - F-[overline nu][sub x]) as a measure for the deleptonization flux which is the one crucial parameter. The transition between the quasi-single-angle behavior and multiangle decoherence is abrupt as a function of epsilon. For typical choices of other parameters, multiangle decoherence is suppressed for epsilon greater than or similar to 0.3, but a much smaller asymmetry suffices if the neutrino mass hierarchy is normal and the mixing angle small. The critical epsilon depends logarithmically on the neutrino luminosity. In a realistic supernova scenario, the deleptonization flux is probably enough to suppress multiangle decoherence.This work was partly supported by the Deutsche Forschungsgemeinschaft under the Grant No. TR-27 "Neutrinos and Beyond", by The Cluster of Excellence for Fundamental Physics "Origin and Structure of the Universe" (Garching and Munich), by the European Union under the ILIAS project (Contract No. RII3-CT-2004-506222) and an RT Network (Contract No. MRTNCT-2004-503369), and by the Spanish grants FPA2005-01269 (MEC) and ACOMP07-270 (Generalitat Valenciana). A. E. has been supported by a FPU grant from the Spanish Government. S. P. and R. T. were supported by MEC contracts (Ramón y Cajal and Juan de la Cierva, respectively).Peer reviewedAmerican Physical Society200820082007info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65012373 bytestext/plainhttp://hdl.handle.net/10261/9058reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1103/PhysRevD.76.125018info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/90582026-05-22T06:33:51Z
dc.title.none.fl_str_mv Decoherence in supernova neutrino transformations suppressed by deleptonization
title Decoherence in supernova neutrino transformations suppressed by deleptonization
spellingShingle Decoherence in supernova neutrino transformations suppressed by deleptonization
Esteban-Pretel, Andreu
Early Universe
[PACS] Neutrino mass and mixing
[PACS] Supernovae
title_short Decoherence in supernova neutrino transformations suppressed by deleptonization
title_full Decoherence in supernova neutrino transformations suppressed by deleptonization
title_fullStr Decoherence in supernova neutrino transformations suppressed by deleptonization
title_full_unstemmed Decoherence in supernova neutrino transformations suppressed by deleptonization
title_sort Decoherence in supernova neutrino transformations suppressed by deleptonization
dc.creator.none.fl_str_mv Esteban-Pretel, Andreu
Pastor Carpi, Sergio
Tomàs, Ricard
Raffelt, Georg G.
Sigl, Günter
author Esteban-Pretel, Andreu
author_facet Esteban-Pretel, Andreu
Pastor Carpi, Sergio
Tomàs, Ricard
Raffelt, Georg G.
Sigl, Günter
author_role author
author2 Pastor Carpi, Sergio
Tomàs, Ricard
Raffelt, Georg G.
Sigl, Günter
author2_role author
author
author
author
dc.subject.none.fl_str_mv Early Universe
[PACS] Neutrino mass and mixing
[PACS] Supernovae
topic Early Universe
[PACS] Neutrino mass and mixing
[PACS] Supernovae
description 16 pages, 12 figures.-- PACS nrs.: 14.60.Pq; 97.60.Bw.-- ISI Article Identifier: 000251987300100.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.2498
publishDate 2007
dc.date.none.fl_str_mv 2007
2008
2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/9058
url http://hdl.handle.net/10261/9058
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1103/PhysRevD.76.125018
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 2373 bytes
text/plain
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
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