Neutral currents and supernovae
- The University of Chicago, Chicago, Illinois 60637 (United States) NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Box 500, Batavia, Illinois 60510-0500 (United States)
A review is made of the role of weak neutral current interactions in astrophysical gravitational collapse events. It is noted that through neutral currents all three species of neutrinos (and anti-neutrinos) are emitted, with roughly an equipartition of energy. This enabled the observed [bar [nu]][sub [ital e]] flux from SN 1987A to be found in good agreement with expectations from the emission of a neutron star's binding energy during the collapse. Contrary to some mistaken opinions, neutral currents are not the reason for neutrino trapping in the central core. It is true that neutral current cross-sections increase the neutrino opacity, but trapping would occur with charged currents alone. A general review of neutrino emission and a comparison with SN 1987A is made.
- OSTI ID:
- 7284138
- Report Number(s):
- CONF-930293-; CODEN: APCPCS
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 300:1; Conference: International symposium on 30 years of neutral currents, Los Angeles, CA (United States), 3-5 Feb 1993; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
NEUTRINOS
PARTICLE PRODUCTION
STAR EVOLUTION
NEUTRAL-CURRENT INTERACTIONS
SUPERNOVAE
WEAK NEUTRAL CURRENTS
CROSS SECTIONS
GRAVITATIONAL COLLAPSE
NEUTRINO DETECTION
ALGEBRAIC CURRENTS
CURRENTS
DETECTION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
INTERACTIONS
LEPTONS
MASSLESS PARTICLES
NEUTRAL CURRENTS
PARTICLE INTERACTIONS
RADIATION DETECTION
STARS
VARIABLE STARS
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