Extension of the Skyrme model and the strangeness problem

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1990

OSTI ID:7206061

Park, Nae Woong

The author discusses the static properties of the soliton which exists in the effective chiral Lagrangian of pseudoscalar and vector mesons which incorporate the non-abelian anomaly structure of QCD. Also he introduces a scalar glueball to mock up the scale anomaly of QCD and considers its coupling to the quarkonium scalar particle and possible mixing between them. He examines the resulting bag formation of the glueball due to the soliton and the physical properties of the soliton. He also explains how to introduce external gauge particles in this scheme and studies the general minimal symmetry breaking structure in the soliton model systematically. In the Skyrme model, he points out that the role the {eta} (SU(2)singlet) particle is subtle. It survives during collective rotation due to the vector meson sources. It changes the static energy and the other physical properties slightly but provides an explanation for the proton-neutron mass difference and for the non-vanishing value of the quark contribution to the proton spin. In the neutron-proton mass difference case the terms including {eta} are the dominant ones but he needs a small SU(3) contribution in addition. In the proton spin problem he adopts a Lagrangian including a pseudoscalar glueball which mocks up the U(1) axial anomaly. He finds that there is a small contribution to the U(1) axial current matrix element in the proton state which is equivalent to the proton spin due to the current quarks. He investigates the detailed structure of the SU(3) Skyrme model in the collective quantization scheme which was greatly improved by Yabu and Ando recently by doing exact diagonalization of the Hamiltonian instead of using the first order perturbation theory.

• Research Organization: Syracuse Univ., NY (United States)
• OSTI ID: 7206061
• Country of Publication: United States
• Language: English

Related Subjects

662240* -- Models for Strong Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
BARYONS
BOSONS
CHIRAL SYMMETRY
COMPOSITE MODELS
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FERMIONS
FIELD THEORIES
FUNCTIONS
GLUEBALLS
HADRONS
LAGRANGIAN FUNCTION
MAGNETIC MOMENTS
MASS DIFFERENCE
MATHEMATICAL MODELS
MESONS
NUCLEON-NUCLEON POTENTIAL
PARTICLE MODELS
PARTICLE PROPERTIES
PERTURBATION THEORY
POTENTIALS
PSEUDOSCALAR MESONS
QUANTIZATION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKONIUM
QUASI PARTICLES
SKYRME POTENTIAL
SOLITONS
STRANGENESS
SYMMETRY
SYMMETRY BREAKING
VECTOR MESONS
WAVE FUNCTIONS