Origin of difference between [ital [bar u]] and [ital [bar d]] partons in the nucleon
Journal Article
·
· Physical Review Letters; (United States)
- 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), Journal Name: Physical Review Letters; (United States) Vol. 72:12; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
662130 -- General Theory of Particles & Fields-- S-Matrix Theory
Relativistic Scattering Theory-- (1992-)
662230 -- Quantum Chromodynamics-- (1992-)
662330* -- Photon & Charged-Lepton Interactions with Hadrons-- (1992)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FEYNMAN PATH INTEGRAL
FIELD THEORIES
FUNCTIONS
HADRONS
INTEGRALS
LATTICE FIELD THEORY
MATHEMATICAL MODELS
NEUTRONS
NUCLEONS
PARTICLE MODELS
POSTULATED PARTICLES
PROPAGATOR
PROTONS
QUANTUM FIELD THEORY
QUARKS
STRUCTURE FUNCTIONS
SUM RULES
UNIFIED GAUGE MODELS
VIOLATIONS
Relativistic Scattering Theory-- (1992-)
662230 -- Quantum Chromodynamics-- (1992-)
662330* -- Photon & Charged-Lepton Interactions with Hadrons-- (1992)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FEYNMAN PATH INTEGRAL
FIELD THEORIES
FUNCTIONS
HADRONS
INTEGRALS
LATTICE FIELD THEORY
MATHEMATICAL MODELS
NEUTRONS
NUCLEONS
PARTICLE MODELS
POSTULATED PARTICLES
PROPAGATOR
PROTONS
QUANTUM FIELD THEORY
QUARKS
STRUCTURE FUNCTIONS
SUM RULES
UNIFIED GAUGE MODELS
VIOLATIONS