Color magnetic corrections to quark model valence distributions

Color magnetic corrections to quark model valence distributions

We calculate order-[alpha][sub [ital s]] color magnetic corrections to the valence quark distributions of the proton using the Los Alamos potential model wave functions. The spin-spin interaction breaks the model SU(4) symmetry, providing a natural mechanism for the difference between the up and dow...

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Veröffentlicht in:Physical review. C, Nuclear physics Nuclear physics, 1993-09, Vol.48 (3), p.1379-1387
Hauptverfasser: Benesh, CJ, Goldman, T, Stephenson, Jr, GJ
Format: Artikel
Sprache:eng
Schlagworte:
BARYONS
COLOR MODEL
COMPOSITE MODELS
CORRECTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
LIE GROUPS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE MODELS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
POTENTIALS
PROTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SU GROUPS
SU-4 GROUPS
SYMMETRY GROUPS 662240 > Models for Strong Interactions-- (1992-)
WAVE FUNCTIONS
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Beschreibung
Zusammenfassung:We calculate order-[alpha][sub [ital s]] color magnetic corrections to the valence quark distributions of the proton using the Los Alamos potential model wave functions. The spin-spin interaction breaks the model SU(4) symmetry, providing a natural mechanism for the difference between the up and down distributions. For a value of [alpha][sub [ital s]] sufficient to produce the [ital N]-[Delta] mass splitting, we find up and down quark distributions in reasonable agreement with experiment.
ISSN:0556-2813
1089-490X
DOI:10.1103/PhysRevC.48.1379