Spontaneous symmetry breaking and vector-meson dominance
This article is a continuation of our previous work on the rho-..pi.. puzzle. It examines further consequences of the unification of partial conservation of axial-vector current (PCAC) and vector-meson dominance (VMD) in which the pion is a Goldstone state and the rho is a ''dormant'' Goldstone state. Our new picture of the vector mesons does not require an A/sub 1/ meson although such a state is not ruled out. The Weinberg sum rules which provide the raison d'etre for the A/sub 1/ are reexamined. The first Weinberg sum rule can be accommodated without a narrow A/sub 1/ state although some enhancement seems required. Examining the J/sup P C/ = 1/sup + -/ nonet we conclude that a new state, the isoscalar octet partner of the B (1235) should exist around 1.7 GeV assuming ideal mixing. Without a detailed assumption on the mixing angle, its mass should be in the range 1.4 to 1.7 GeV. We also discuss the photon-rho interactions. In the standard VMD picture the predicted rate for rho ..-->.. ..pi.. + ..gamma.. fails by five standard deviations, while in our picture this undesired result is averted.
- Research Organization:
- Department of Physics, Rutgers University, New Brunswick, New Jersey 08903
- OSTI ID:
- 7214960
- Journal Information:
- Phys. Rev., D; (United States), Vol. 15:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PCAC THEORY
SYMMETRY BREAKING
VECTOR DOMINANCE MODEL
CHIRAL SYMMETRY
GOLDSTONE BOSONS
PARITY
PIONS
SPIN
SU-3 GROUPS
SU-6 GROUPS
SUM RULES
VECTOR MESONS
ANGULAR MOMENTUM
BOSONS
ELEMENTARY PARTICLES
EQUATIONS
HADRONS
LIE GROUPS
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SU GROUPS
SYMMETRY
SYMMETRY GROUPS
645303* - High Energy Physics- Particle Invariance Principles & Symmetries- Applications to Strong Interactions- (-1987)