Chiral quark-meson model of N and. delta. with vector mesons

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:7192084

Broniowski, W B

This thesis presents a chiral model of the nucleon and delta in which three valence quarks interact via the exchange of scalar and vector mesons. The main topics addressed are: (1) the justification of the model from QCD, (2) the resulting phenomenology of N and ..delta.., and (3) the analysis of the classical stability of the system. A fully self-consistent solution to the model is obtained. It is found that the vector mesons play a very important role in the system, contributing significantly to the values of observables. The result for the physical properties of N and ..delta.. are improved very much compared to a similar model without vector mesons. The author analyzes the classical stability of the system with respect to excitations within the hedgehog ansatz. For this purpose Quark-Meson RPA equations are solved numerically. It is shown that the solution representing N and ..delta.. is stable. It is also found that the stable solution exists only for a limited range of parameters. This provides both upper and lower bounds for the values of the coupling constants.

• Research Organization: Maryland Univ., College Park (USA)
• OSTI ID: 7192084
• Country of Publication: United States
• Language: English

Related Subjects

645201 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
645400* -- High Energy Physics-- Field Theory
653001 -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALGEBRAIC CURRENTS
ANALYTICAL SOLUTION
AXIAL-VECTOR CURRENTS
BARYONS
BOSONS
COMPOSITE MODELS
COUPLING CONSTANTS
CURRENTS
DELTA-1236 RESONANCES
ELEMENTARY PARTICLES
FERMIONS
HADRONS
MATHEMATICAL MODELS
MESONS
NUCLEONS
PARTICLE MODELS
PARTICLE PROPERTIES
QUARK MODEL
RANDOM PHASE APPROXIMATION
STABILITY
VECTOR MESONS