Current algebra and the cloudy-bag model

Journal Article · Fri Jan 31 23:00:00 EST 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.33.817· OSTI ID:6364476

Morgan, M A; Miller, G A; Thomas, A W

Two versions of the cloudy-bag model (surface and volume coupling) satisfy the commutation relations of current algebra. Perturbation-theory evaluations of various observables are compared for the two treatments. The electromagnetic properties are essentially the same in both versions. The volume-coupling model contains, in lowest order, a pion-quark contact interaction that contributes to the axial-vector current. Including the effect of this term leads to a computed value of g/sub A/ of about 1.25, if the radius of the nucleon bag is around 1.0 fm.

• Research Organization: Department of Physics, FM-15, University of Washington, Seattle, Washington 98195
• OSTI ID: 6364476
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 33:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
AXIAL-VECTOR CURRENTS
BAG MODEL
BASIC INTERACTIONS
COMPOSITE MODELS
COUPLING CONSTANTS
CURRENT ALGEBRA
CURRENTS
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EQUATIONS
EQUATIONS OF MOTION
EXTENDED PARTICLE MODEL
FUNCTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PERTURBATION THEORY
PION-NUCLEON INTERACTIONS
POSTULATED PARTICLES
QUARK MODEL
QUARKS
SCATTERING
VERTEX FUNCTIONS