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Nucleon form factors in an independent-quark model based on Dirac equation with power-law potential

Journal Article · · Phys. Rev. D; (United States)
;
The nucleon electromagnetic form factors G/sub E//sup p/(qS) and G/sub M//sup p/(qS) and the axial-vector form factor G/sub A/(qS) are investigated in a simple model of relativistic quarks confined by a vector-scalar mixed potential U/sub q/(r) = (1+el)(a/sup nu+1/r/sup / +V0) without taking into account the center-of-mass correction and the pion-cloud effects. The respective rms radii associated with G/sub E//sup p/(qS) and G/sub A/(qS) come out as /sup 1/2/ = 1.07 fm and /sup 1/2/ = 1.17 fm. The possibility of restoring in this model the chiral symmetry in the usual way is discussed and the pion-nucleon form factor G/sub piN/N(qS) is derived. The pion-nucleon coupling constant is obtained as g/sub piN/N = 10.2, as compared to (g/sub piN/N)/sub expt/approx. =13.
Research Organization:
Department of Physics, Utkal University, Bhubaneswar 751 004, Orissa, India
OSTI ID:
6173977
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 33:1; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
BARYONS
CHIRAL SYMMETRY
COMPOSITE MODELS
COUPLING CONSTANTS
DIFFERENTIAL EQUATIONS
DIRAC EQUATION
ELECTROMAGNETIC FORM FACTORS
ELEMENTARY PARTICLES
EQUATIONS
EXTENDED PARTICLE MODEL
FERMIONS
FORM FACTORS
FUNCTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MAGNETIC MOMENTS
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
NUCLEONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PION-NUCLEON INTERACTIONS
POTENTIALS
QUARK MODEL
SYMMETRY
WAVE EQUATIONS
WAVE FUNCTIONS