Flavor distributions in the nucleons: SU(2) sea asymmetry or isospin symmetry breaking

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.51· OSTI ID:7119703

Ma, B; Schaefer, A; Greiner, W ^[1]

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1. Institut fuer Theoretische Physik der Universitaet Frankfurt am Main, Postfach 111932, D-6000 Frankfurt (Germany)

The Gottfried sum-rule violation reported by the New Muon Collaboration was interpreted as an indication for a flavor asymmetry of the sea quark in the nucleon. We investigate the alternative possibility that isospin symmetry between the proton and the neutron is breaking for small [ital x]. We examine systematically the consequences of this possibility for several processes, namely, neutrino deep inelastic scattering, the charged pion Drell-Yan process, the proton Drell-Yan process, and semi-inclusive deep inelastic scattering, and conclude that a decision between the two alternative explanations is possible.

• OSTI ID: 7119703
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:1; ISSN PRVDAQ; 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-)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BARYONS
COMPOSITE MODELS
DEEP INELASTIC SCATTERING
DRELL MODEL
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FLAVOR MODEL
HADRONS
INELASTIC SCATTERING
INTERACTIONS
ISOSPIN
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LIE GROUPS
MATHEMATICAL MODELS
NEUTRINO-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PARTONS
POSTULATED PARTICLES
QUARK MODEL
SCATTERING
SU GROUPS
SU-2 GROUPS
SUM RULES
SYMMETRY BREAKING
SYMMETRY GROUPS