Mean-field approximation for chiral quark bag models

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.26.3235· OSTI ID:6790833

Hoodbhoy, P

A chirally invariant quark model of the nucleon is studied by the use of a Tomonaga type of approximation. Static nucleon properties are calculated as a function of the bag radius and compared against corresponding quantities obtained perturbatively, as indeed has been done invariably in existing chiral bag calculations. It is found that for some observables (such as the energy) the perturbation treatment becomes unacceptably inaccurate for R< or approx. =0.9 fm. However, electromagnetic properties may be accurately calculated for much smaller bag radii, provided that a coupling constant (f/sub 0/) is appropriately adjusted to give the correct asymptotic pion field strength.

• Research Organization: Institute for Nuclear Theory, Department of Physics, FM 15, University of Washington, Seattle, Washington 98195
• OSTI ID: 6790833
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 26:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645301* -- High Energy Physics-- Particle Invariance Principles &amp; Symmetries-- General-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
BARYONS
CHIRAL SYMMETRY
COMPOSITE MODELS
COUPLING CONSTANTS
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FERMIONS
HADRONS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE MODELS
PERTURBATION THEORY
QUARK MODEL
SYMMETRY