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Limits to the radiative decays of neutrinos and axions from. gamma. -ray observations of SN 1987A. [SN 1987A]

Journal Article · · Phys. Rev. Lett.; (United States)
;
Using ..gamma..-ray observations made by the Solar Maximum Mission Gamma Ray Spectrometer in the energy range 4.1--6.4 MeV we limit the possible radiative decays of neutrinos and axions emitted by SN 1987A. For neutrinos less massive than about 20 eV our constraint is tau/sub v//m/sub v/approx. >1.7 x 10/sup 15/ B/sub ..gamma../ sec/eV; for masses between 20 and 100 eV, tau/sub v//3.4 x 10/sup 16/ B/sub ..gamma../..gamma../sub GRS//sup -1/2/ sec; and for masses between 100 eV and a few MeV, tau/sub v/m/sub v/approx. >8.4 x 10/sup 17/ B/sub ..gamma../ sec eV. Here B/sub ..gamma../ is the branching ratio for the radiative decay mode and ..gamma../sub GRS/ is yet to be determined from the data, but should be of order unity. The axion mass limit is m/sub a/approx. <55..gamma../sub GRS//sup 11/94/ eV.
Research Organization:
NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500
OSTI ID:
6439145
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:5; ISSN PRLTA
Country of Publication:
United States
Language:
English

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Related Subjects

640102* -- Astrophysics &amp; Cosmology-- Stars &amp; Quasi-Stellar
Radio &amp; X-Ray Sources
645102 -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIONS
BOSONS
COSMIC GAMMA BURSTS
COSMIC GAMMA SOURCES
COSMIC RADIATION
COSMIC RAY SOURCES
DATA
ELEMENTARY PARTICLES
ENERGY RANGE
ERUPTIVE VARIABLE STARS
EXPERIMENTAL DATA
FERMIONS
GALAXIES
GAMMA SPECTRA
GOLDSTONE BOSONS
INFORMATION
IONIZING RADIATIONS
LEPTONS
LIMITING VALUES
MAGELLANIC CLOUDS
MASSLESS PARTICLES
MEV RANGE
MEV RANGE 01-10
NEUTRINOS
NUMERICAL DATA
POSTULATED PARTICLES
PRIMARY COSMIC RADIATION
RADIATIONS
RADIATIVE DECAY
SPECTRA
STARS
SUPERNOVAE
VARIABLE STARS