Is the q q sea in the nucleon isospin symmetric

Journal Article · Fri Nov 01 00:00:00 EST 1991 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.44.R2631· OSTI ID:6034750

Wakamatsu, M ^[1]

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

The New Muon Collaboration (NMC) has recently performed a detailed analysis of the difference between the proton and neutron structure functions. They found that the Gottfried sum {integral}{ital dx}({ital F}{sub 2}{sup {ital p}}({ital x}){minus}{ital F}{sub 2}{sup {ital n}}({ital x}))/{ital x} is significantly below the simple quark-parton model prediction of 1/3, which indicates a sizable isospin asymmetry of the {ital q{bar q}} sea in the nucleon. We have carried out a theoretical analysis of the Gottfried sum on the basis of a chiral-quark-soliton model, and obtained a satisfactory agreement with the NMC measurement.

• OSTI ID: 6034750
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 44:9; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
NUCLEONS
STRUCTURE FUNCTIONS
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DIRAC EQUATION
EIGENSTATES
FLAVOR MODEL
ISOSPIN
MEAN-FIELD THEORY
MUONS
PARTONS
QUANTUM CHROMODYNAMICS
QUARKONIUM
SOLITONS
SUM RULES
SYMMETRY BREAKING
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DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
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FIELD THEORIES
FUNCTIONS
HADRONS
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PARTIAL DIFFERENTIAL EQUATIONS
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PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARK MODEL
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SYMMETRY
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