Vector-meson--nucleon couplings at spacelike momentum transfer

Journal Article · Sun Mar 01 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.1817· OSTI ID:7235148

Gari, M F; Kruempelmann, W ^[1]

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1. Institut fuer Theoretische Physik, Ruhr-Universitaet Bochum, D-4630 Bochum (Germany)

We have analyzed the presently available experimental data on the electromagnetic form factors for the nucleon to obtain information on the vector-meson--nucleon couplings. We obtained a strong momentum dependence of both vector and tensor couplings at spacelike momentum transfers. In addition a strong momentum dependence is found for the ratio of tensor/vector couplings. This indicates a small tensor coupling at {ital t}=0, despite a large value at {ital t}={ital m}{sub {ital V}}{sup 2}. The results depend critically on the measured ratio of Pauli/Dirac em-proton form factors. So further measurements on all {ital t} would be of great interest concerning our understanding of the nucleon structure.

• OSTI ID: 7235148
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 45:5; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
MESON-NUCLEON INTERACTIONS
COUPLING CONSTANTS
NUCLEONS
ELECTROMAGNETIC FORM FACTORS
DIRAC FORM FACTORS
MAGNETIC MOMENTS
MOMENTUM TRANSFER
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
VECTOR DOMINANCE MODEL
VECTOR MESONS
BARYONS
BOSONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FORM FACTORS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
QUANTUM FIELD THEORY
662340* - Hadron Interactions- (1992-)
662230 - Quantum Chromodynamics- (1992-)
662410 - Properties of Baryons & Baryon Resonances- (1992-)