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Title: Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos

Abstract

It was recently realized that three-flavor effects could peculiarly modify the development of spectral splits induced by collective oscillations, for supernova neutrinos emitted during the cooling phase of a protoneutron star. We systematically explore this case, explaining how the impact of these three-flavor effects depends on the ordering of the neutrino masses. In inverted mass hierarchy, the solar mass splitting gives rise to instabilities in regions of the (anti)neutrino energy spectra that were otherwise stable under the leading two-flavor evolution governed by the atmospheric mass splitting and by the 1-3 mixing angle. As a consequence, the high-energy spectral splits found in the electron (anti)neutrino spectra disappear, and are transferred to other flavors. Imperfect adiabaticity leads to smearing of spectral swap features. In normal mass hierarchy, the three-flavor and the two-flavor instabilities act in the same region of the neutrino energy spectrum, leading to only minor departures from the two-flavor treatment.

Authors:
 [1]; ;  [2];  [1];  [3];  [3]
  1. Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Foehringer Ring 6, 80805 Muenchen (Germany)
  2. II Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany)
  3. (Italy)
Publication Date:
OSTI Identifier:
21409924
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 81; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.81.093008; (c) 2010 The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COOLING; ELECTRONS; ENERGY SPECTRA; FLAVOR MODEL; INSTABILITY; MASS; NEUTRINOS; OSCILLATIONS; STARS; SUPERNOVAE; WEINBERG ANGLE; BINARY STARS; COMPOSITE MODELS; ELEMENTARY PARTICLES; ERUPTIVE VARIABLE STARS; FERMIONS; LEPTONS; MASSLESS PARTICLES; MATHEMATICAL MODELS; PARTICLE MODELS; QUARK MODEL; SPECTRA; VARIABLE STARS

Citation Formats

Dasgupta, Basudeb, Mirizzi, Alessandro, Tomas, Ricard, Tamborra, Irene, Dipartimento Interateneo di Fisica 'Michelangelo Merlin', Via Amendola 173, 70126 Bari, and INFN, Sezione di Bari, Via Orabona 4, 70126 Bari. Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.093008.
Dasgupta, Basudeb, Mirizzi, Alessandro, Tomas, Ricard, Tamborra, Irene, Dipartimento Interateneo di Fisica 'Michelangelo Merlin', Via Amendola 173, 70126 Bari, & INFN, Sezione di Bari, Via Orabona 4, 70126 Bari. Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos. United States. doi:10.1103/PHYSREVD.81.093008.
Dasgupta, Basudeb, Mirizzi, Alessandro, Tomas, Ricard, Tamborra, Irene, Dipartimento Interateneo di Fisica 'Michelangelo Merlin', Via Amendola 173, 70126 Bari, and INFN, Sezione di Bari, Via Orabona 4, 70126 Bari. Sat . "Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos". United States. doi:10.1103/PHYSREVD.81.093008.
@article{osti_21409924,
title = {Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos},
author = {Dasgupta, Basudeb and Mirizzi, Alessandro and Tomas, Ricard and Tamborra, Irene and Dipartimento Interateneo di Fisica 'Michelangelo Merlin', Via Amendola 173, 70126 Bari and INFN, Sezione di Bari, Via Orabona 4, 70126 Bari},
abstractNote = {It was recently realized that three-flavor effects could peculiarly modify the development of spectral splits induced by collective oscillations, for supernova neutrinos emitted during the cooling phase of a protoneutron star. We systematically explore this case, explaining how the impact of these three-flavor effects depends on the ordering of the neutrino masses. In inverted mass hierarchy, the solar mass splitting gives rise to instabilities in regions of the (anti)neutrino energy spectra that were otherwise stable under the leading two-flavor evolution governed by the atmospheric mass splitting and by the 1-3 mixing angle. As a consequence, the high-energy spectral splits found in the electron (anti)neutrino spectra disappear, and are transferred to other flavors. Imperfect adiabaticity leads to smearing of spectral swap features. In normal mass hierarchy, the three-flavor and the two-flavor instabilities act in the same region of the neutrino energy spectrum, leading to only minor departures from the two-flavor treatment.},
doi = {10.1103/PHYSREVD.81.093008},
journal = {Physical Review. D, Particles Fields},
number = 9,
volume = 81,
place = {United States},
year = {Sat May 01 00:00:00 EDT 2010},
month = {Sat May 01 00:00:00 EDT 2010}
}