Chiral Quark-Meson model of N and DELTA with vector mesons
Vector mesons rho, A/sub 1/ and ..omega.. are introduced in the Chiral Quark-Meson Theory (CQMT) of N and ..delta... We propose a new viewpoint for developing CQMT from QCD at the mean-field level. The SU(2) x SU(2) chiral Lagrangian incorporates universal coupling. Accordingly, rho is coupled to the conserved isospin current, A to the partially conserved axial-vector current (PCAC), and ..omega.. to the conserved baryon current. As a result the only parameter of the model not directly related to experiment is the quark-pion coupling constant. A fully self-consistent mean-field solution to the model is found for fields in the hedgehog ansatz. The vector mesons play a very important role in the system. They contribute significantly to the values of observables and produce a high-quality fit to many data. The classical stability of the system with respect to hedgehog excitations is analyzed through the use of the Quark-Meson RPA equations (QMRPA).
- Research Organization:
- Maryland Univ., College Park (USA). Dept. of Physics and Astronomy
- DOE Contract Number:
- AS05-76ER05126
- OSTI ID:
- 6006262
- Report Number(s):
- DOE/ER/05126-254; ORO-5126-254; ON: DE86007349
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Baryon No. = 1-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
CHIRALITY
COMPOSITE MODELS
DELTA-966 RESONANCES
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
MATHEMATICAL MODELS
MEAN-FIELD THEORY
MESONS
NUCLEONS
PARTICLE MODELS
PARTICLE PROPERTIES
PCAC THEORY
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
STABILITY
VECTOR MESONS