Limits to the radiative decays of neutrinos and axions from. gamma. -ray observations of SN 1987A
Technical Report
·
OSTI ID:5343796
Using ..gamma..-ray observations made by the Solar Maximum Mission Gamma Ray Spectrometer in the energy range 4.1 to 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 nu//m/sub nu/ greater than 1.7 x 10/sup 15/ B/sub ..gamma../ sec/eV; and for masses between 20 and 275 eV our constraint is tau/sub nu/ greater than 3.4 x 10/sup 16/ B/sub ..gamma../..gamma../sub GRS//sup -1/2/ sec, where B/sub ..gamma../ is the branching ratio for the radiative decay mode and ..gamma../sub GRS/ is the yet undetermined instrument background count rate in units of 0.1 sec/sup -1/. The first limit is some 2 orders-or-magnitude better than the previous limit based upon the integrated ..gamma..-ray flux from all supernovae. The axion limit is less interesting: m/sub ..cap alpha../ less than 55..gamma../sub GRS//sup 11/94/ eV. 15 refs.
- Research Organization:
- Fermi National Accelerator Lab., Batavia, IL (USA); Chicago Univ., IL (USA). Enrico Fermi Inst.
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 5343796
- Report Number(s):
- FNAL/Pub-87/223-A-Rev.; ON: DE88006995
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640101 -- Astrophysics & Cosmology-- Cosmic Radiation
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIONS
BOSONS
BRANCHING RATIO
COSMIC NEUTRINOS
COSMIC RADIATION
DENSITY
DETECTION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
GAMMA SPECTROSCOPY
GOLDSTONE BOSONS
IONIZING RADIATIONS
LEPTONS
LIFETIME
MASS
MASSLESS PARTICLES
NEUTRINO DETECTION
NEUTRINOS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
RADIATION DETECTION
RADIATIONS
RADIATIVE DECAY
REST MASS
SPECTROSCOPY
STARS
SUPERNOVAE
VARIABLE STARS
645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIONS
BOSONS
BRANCHING RATIO
COSMIC NEUTRINOS
COSMIC RADIATION
DENSITY
DETECTION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
GAMMA SPECTROSCOPY
GOLDSTONE BOSONS
IONIZING RADIATIONS
LEPTONS
LIFETIME
MASS
MASSLESS PARTICLES
NEUTRINO DETECTION
NEUTRINOS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
RADIATION DETECTION
RADIATIONS
RADIATIVE DECAY
REST MASS
SPECTROSCOPY
STARS
SUPERNOVAE
VARIABLE STARS