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), Vol. 15:7
- Country of Publication:
- United States
- Language:
- English
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INTERMEDIATE VECTOR BOSONS
PARTICLE PRODUCTION
UNIFIED GAUGE MODELS
CHARM PARTICLES
NEUTRAL CURRENTS
QUARK MODEL
SU-4 GROUPS
SYMMETRY BREAKING
ALGEBRAIC CURRENTS
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COMPOSITE MODELS
CURRENTS
ELEMENTARY PARTICLES
INTERACTIONS
INTERMEDIATE BOSONS
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645205* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions
Baryon No. = 0- (-1987)
645201 - High Energy Physics- Particle Interactions & Properties-Theoretical- General & Scattering Theory