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Title: Massive [tau] neutrino and SN 1987A

Abstract

The emission of MeV-mass [tau] neutrinos from newly formed neutron stars is considered in a simple, but accurate, model based upon the diffusion approximation. The [tau]-neutrinosphere temperature is found to increase with mass so that the emission of massive [tau] neutrinos is not suppressed by the Boltzmann factor previously used, ([ital m][sub [nu]]/[ital T][sub [nu]])[sup 1.5]exp([minus][ital m][sub [nu]]/[ital T][sub [nu]]), where [ital T][sub [nu]][similar to]4 MeV--8 MeV. For short [tau] neutrino lifetimes ([tau][sub [nu]][approx lt]10[sup [minus]3] sec) decays and inverse decays lead to a reduction in the temperature of the [tau] neutrinosphere. Using our results, we revise limits to the mass and lifetime of an MeV-mass [tau] neutrino based upon SN 1987A. Our constraints, together with bounds based upon primordial nucleosynthesis and laboratory experiments, exclude the possibility of a [tau] neutrino more massive than 0.4 MeV if the dominant decay mode is radiative and [tau][sub [nu]][approx gt]2.5[times]10[sup [minus]12] sec ([ital m][sub [nu]]/MeV). The lifetime restriction does not apply for the modes [nu][sub [tau]][r arrow][nu][sub [ital e],[mu]]+[gamma]. Our technique and results are easily generalized to other hypothetical MeV-mass particles whose interactions are of roughly weak strength. Finally, we speculate on the possible role a 15 MeV--30 MeV [tau] neutrino might playmore » in powering supernova explosions.« less

Authors:
 [1];  [2]
  1. Department of Astronomy Astrophysics, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States) NASA/Fermi Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States)
  2. Department of Astronomy Astrophysics, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States) NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States) Department of Physics, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States)
Publication Date:
OSTI Identifier:
6852739
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 51:4; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; TAU NEUTRINOS; EMISSION; MEV RANGE; DIFFUSION; LIFETIME; NEUTRON STARS; NUCLEOSYNTHESIS; SUPERNOVAE; ELEMENTARY PARTICLES; ENERGY RANGE; ERUPTIVE VARIABLE STARS; FERMIONS; HEAVY LEPTONS; LEPTONS; MASSLESS PARTICLES; NEUTRINOS; POSTULATED PARTICLES; STARS; SYNTHESIS; VARIABLE STARS; 662430* - Properties of Leptons- (1992-)

Citation Formats

Sigl, G, and Turner, M S. Massive [tau] neutrino and SN 1987A. United States: N. p., 1995. Web. doi:10.1103/PhysRevD.51.1499.
Sigl, G, & Turner, M S. Massive [tau] neutrino and SN 1987A. United States. https://doi.org/10.1103/PhysRevD.51.1499
Sigl, G, and Turner, M S. Wed . "Massive [tau] neutrino and SN 1987A". United States. https://doi.org/10.1103/PhysRevD.51.1499.
@article{osti_6852739,
title = {Massive [tau] neutrino and SN 1987A},
author = {Sigl, G and Turner, M S},
abstractNote = {The emission of MeV-mass [tau] neutrinos from newly formed neutron stars is considered in a simple, but accurate, model based upon the diffusion approximation. The [tau]-neutrinosphere temperature is found to increase with mass so that the emission of massive [tau] neutrinos is not suppressed by the Boltzmann factor previously used, ([ital m][sub [nu]]/[ital T][sub [nu]])[sup 1.5]exp([minus][ital m][sub [nu]]/[ital T][sub [nu]]), where [ital T][sub [nu]][similar to]4 MeV--8 MeV. For short [tau] neutrino lifetimes ([tau][sub [nu]][approx lt]10[sup [minus]3] sec) decays and inverse decays lead to a reduction in the temperature of the [tau] neutrinosphere. Using our results, we revise limits to the mass and lifetime of an MeV-mass [tau] neutrino based upon SN 1987A. Our constraints, together with bounds based upon primordial nucleosynthesis and laboratory experiments, exclude the possibility of a [tau] neutrino more massive than 0.4 MeV if the dominant decay mode is radiative and [tau][sub [nu]][approx gt]2.5[times]10[sup [minus]12] sec ([ital m][sub [nu]]/MeV). The lifetime restriction does not apply for the modes [nu][sub [tau]][r arrow][nu][sub [ital e],[mu]]+[gamma]. Our technique and results are easily generalized to other hypothetical MeV-mass particles whose interactions are of roughly weak strength. Finally, we speculate on the possible role a 15 MeV--30 MeV [tau] neutrino might play in powering supernova explosions.},
doi = {10.1103/PhysRevD.51.1499},
url = {https://www.osti.gov/biblio/6852739}, journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 51:4,
place = {United States},
year = {1995},
month = {2}
}