Deep-inelastic spin and flavor asymmetry of the nucleon from a QCD-inspired quark model

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.5613· OSTI ID:7006357

Dziembowski, Z; Martoff, C J; Zyla, P ^[1]

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1. Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (United States)

A systematic procedure is described which permits the structure functions of nucleons to be calculated from a nonrelativistic constituent quark model. Transformation from the nucleon rest frame to the light cone or infinite momentum frame is accomplished based on work of Susskind, which does not require the weak binding and nonrelativistic kinematical approximations used in previous work. The light-cone distribution functions so obtained are then subjected to QCD evolution, giving predictions for the quark momentum densities. The model incorporates SU(6) breaking by the QCD-inspired one gluon exchange potential originated by De Rujula, Georgi, and Glashow, with the parameters fixed by Isgur and Karl from the [ital N]-[Delta] mass splitting. In contrast with some previous work, the parameter values which fit the baryon mass spectrum are here shown to also give rather good agreement with the deep-inelastic flavor and spin asymmetries in the valence region.

• OSTI ID: 7006357
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
ASYMMETRY
BARYON REACTIONS
BARYONS
COMPOSITE MODELS
DEEP INELASTIC SCATTERING
DEUTERIUM TARGET
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR
FUNCTIONS
HADRON REACTIONS
HADRONS
HYDROGEN 1 TARGET
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LIE GROUPS
LIGHT CONE
MASS SPECTRA
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
ORGANOLEPTIC PROPERTIES
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SCATTERING
SPACE-TIME
SPECTRA
SPIN
STRUCTURE FUNCTIONS
SU GROUPS
SU-6 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
TARGETS