Can very light neutral vector bosons exist
Models which unify strong, electromagnetic, and weak interactions contain many neutral gauge fields. A generalization of the Pati-Salam model with fractional-charge quarks is used as an example to investigate whether all gauge fields, except those coupled to the SU(2) x U(1) subgroup of Weinberg-Salam, must develop large masses and become unobservable. The possible existence of a neutral boson with a mass much smaller than that of W/sup plus-or-minus/ is considered. Constraints from known properties of neutral currents together with the assumption of an explicit symmetry-breaking mechanism produce a model with two neutral vector bosons, neither of which has the Weinberg-Salam structure. One particle is very light and decoupled from left-handed neutrinos, and the other is heavy and responsible for observed neutral-current interactions. A brief comparison with experimental data does not exclude this model. The existence of a very light, neutral, purely charm-changing neutral vector boson is considered.
- Research Organization:
- Department of Physics and Astronomy, University of Massachusetts, Amherst, Massachusetts 01003
- OSTI ID:
- 7304588
- Journal Information:
- Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 15:7; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645205* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. = 0-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
BOSONS
CHARM PARTICLES
COMPOSITE MODELS
CURRENTS
ELEMENTARY PARTICLES
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LIE GROUPS
MATHEMATICAL MODELS
NEUTRAL CURRENTS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARK MODEL
SU GROUPS
SU-4 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
UNIFIED GAUGE MODELS