Origin of difference between [ital [bar u]] and [ital [bar d]] partons in the nucleon

Journal Article · Mon Mar 21 00:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.1790· OSTI ID:5016232

Liu, K; Dong, S ^[1]

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1. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506 (United States)

Using the Euclidean path-integral formulation for the hadronic tensor, we show that the large difference between [ital [bar u]] and [ital [bar d]] does not come from the disconnected quark-loop insertion. Rather, it can come from the connected (quark line) insertion involving quarks propagating backwards in time. We study the influence of the backward time propagator in the axial-vector and scalar matrix elements in lattice gauge calculations and give an estimate of the violation of the Gottfried sum rule.

• DOE Contract Number: FG05-84ER40154
• OSTI ID: 5016232
• Journal Information: Physical Review Letters; (United States), Vol. 72:12; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
NEUTRONS
STRUCTURE FUNCTIONS
PROTONS
FEYNMAN PATH INTEGRAL
LATTICE FIELD THEORY
PROPAGATOR
QUARKS
SUM RULES
UNIFIED GAUGE MODELS
VIOLATIONS
BARYONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
INTEGRALS
MATHEMATICAL MODELS
NUCLEONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
662330* - Photon & Charged-Lepton Interactions with Hadrons- (1992)
662130 - General Theory of Particles & Fields- S-Matrix Theory
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662230 - Quantum Chromodynamics- (1992-)
662410 - Properties of Baryons & Baryon Resonances- (1992-)