Chiral quark soliton model and flavor-asymmetric q q sea in the nucleon

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.3762· OSTI ID:7158030

Wakamatsu, M ^[1]

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1. Department of Physics, Faculty of Science, Osaka University, Toyonaka, Osaka 560 (Japan)

By making full use of the advantage of the chiral quark soliton model, we investigate the flavor structure of the sea-quark components in the nucleon. First, through the analysis of the charge distributions of the proton and neutron, we demonstrate that the effect of sea quarks incorporated in this model can be identified with that of the cloud of pions surrounding the core of three valence quarks. Next, not only the integrated value but also the spatial structure of the {ital q{bar q}} scalar condensate in the nucleon is studied with emphasis upon the separate functions of the valence and sea quarks. The enhancement of the {ital {bar d}d} scalar condensate relative to the {ital {bar u}u} one in the proton is shown to be consistent with QCD phenomenology. We have also carried out a theoretical analysis of the Gottfried sum on the basis of the chiral quark soliton model and obtained a satisfactory agreement with the recent New Muon Collaboration measurement.

• OSTI ID: 7158030
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
662340 -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
CHARGE DISTRIBUTION
CHIRAL SYMMETRY
COMPOSITE MODELS
CORRELATION FUNCTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FORM FACTORS
FUNCTIONS
HADRONS
INTERACTIONS
ISOSPIN
MATHEMATICAL MODELS
MESONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK CONDENSATION
QUARK MODEL
QUARK-ANTIQUARK INTERACTIONS
QUASI PARTICLES
SOLITONS
SYMMETRY
SYMMETRY BREAKING
VACUUM STATES
VALENCE