Quark interchange model of baryon interactions

Thesis/Dissertation · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6466045

Maslow, J N

The strong interactions at low energy are traditionally described by meson field theories treating hadrons as point-like particles. Here a mesonic quark interchange model (QIM) is presented which takes into account the finite size of the baryons and the internal quark structure of hadrons. The model incorporates the basic quark-gluon coupling of quantum chromodynamics (QCD) and the MIT bag model for color confinement. Because the quark-gluon coupling constant is large and it is assumed that confinement excludes overlap of hadronic quark bags except at high momenta, a non-perturbative method of nuclear interactions is presented. The QIM allows for exchange of quark quantum numbers at the bag boundary between colliding hadrons mediated at short distances by a gluon exchange between two quarks within the hadronic interior. This generates, via a Fierz transformation, an effective space-like t channel exchange of color singlet (q anti-q) states that can be identified with the low lying meson multiplets. Thus, a one boson exchange (OBE) model is obtained that allows for comparison with traditional phenomenological models of nuclear scattering. Inclusion of strange quarks enables calculation of YN scattering. The NN and YN coupling constants and the nucleon form factors show good agreement with experimental values as do the deuteron low energy data and the NN low energy phase shifts. Thus, the QIM provides a simple model of strong interactions that is chirally invariant, includes confinement and allows for an OBE form of hadronic interaction at low energies and momentum transfers.

• Research Organization: Virginia Univ., Charlottesville (USA)
• OSTI ID: 6466045
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
OBE MODEL
BAG MODEL
COUPLING CONSTANTS
EXCHANGE INTERACTIONS
PARTICLE MODELS
QUANTUM CHROMODYNAMICS
QUARK MODEL
BOSON-EXCHANGE MODELS
COMPOSITE MODELS
EXTENDED PARTICLE MODEL
FIELD THEORIES
HADRON-HADRON INTERACTIONS
INTERACTIONS
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PERIPHERAL MODELS
QUANTUM FIELD THEORY
645207* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions
Baryon No. Greater than 1- (-1987)