Published September 2004 | Version v1
Journal article Metadata-only

Genuine twist-3 contributions to the generalized parton distributions from instantons

Creators

  • 1. Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, 44780, Bochum (Germany)
  • 2. Petersburg Nuclear Physics Institute, 188350, Gatchina, St. Petersburg (Russian Federation)

Description

The genuine twist-3 quark-gluon (anti qGq) contributions to the generalized parton distributions (GPDs) are estimated in the model of the instanton vacuum. These twist-3 effects are found to be parametrically suppressed relative to the ''kinematical'' twist-3 ones due to the small packing fraction of the instanton vacuum. We derived exact sum rules for the twist-3 GPDs. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epjc/s2004-01957-3

Additional details

Identifiers

DOI
10.1140/epjc/s2004-01957-3;

Publishing Information

Journal Title
European Physical Journal. C
Journal Volume
37
Journal Issue
1
Journal Page Range
p. 105-114
ISSN
1434-6044

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
35088215
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
COMPTON EFFECT; DISTRIBUTION FUNCTIONS; INSTANTONS; MATRIX ELEMENTS; NUCLEONS; PARTICLE STRUCTURE; PARTON MODEL; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; SCATTERING AMPLITUDES; STRUCTURE FUNCTIONS; SUM RULES; VACUUM STATES
Descriptors DEC
AMPLITUDES; BARYONS; BASIC INTERACTIONS; COMPOSITE MODELS; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; EQUATIONS; FERMIONS; FIELD THEORIES; FUNCTIONS; HADRONS; INTERACTIONS; MATHEMATICAL MODELS; PARTICLE MODELS; QUANTUM FIELD THEORY; QUASI PARTICLES; SCATTERING