Meson exchange calculation of the p-barp. -->. Lambda-bar. lambda. reaction
Journal Article
·
· Phys. Rev. C; (United States)
The process p-barp..-->..Lambda-bar..lambda.. is studied using a one-boson t-channel strangeness exchange mechanism incorporating pseudoscalar, vector, and tensor mesons. Particular attention is paid to the spin degrees of freedom in the calculation. Initial and final state interactions, including the spin-orbit interaction and absorption, are taken into account using simple phenomenological models. The calculations are performed using density matrix ideas in the helicity basis, and the most important contributing amplitudes are identified. A reasonable fit to existing data can be obtained by allowing a smooth variation of the final state parameters with laboratory momentum. The effect of each of the exchanged mesons, and of the initial- and final-state baryon-baryon interactions on the cross sections and spin observables, is discussed. It is found that the tensor meson exchange plays an essential role even near threshold, which indicates the need for a detailed understanding of the short-range spin dynamics, perhaps as provided by future quark model studies.
- Research Organization:
- University of Pittsburgh, Pittsburgh, Pennsylvania 15260
- OSTI ID:
- 5885407
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:5; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651215* -- Nuclear Properties & Reactions
A=1-5
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
653007 -- Nuclear Theory-- Nuclear Models-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIBARYONS
ANTIHYPERONS
ANTILAMBDA PARTICLES
ANTIMATTER
ANTIPARTICLES
BARYON-BARYON INTERACTIONS
BARYONS
BOSON-EXCHANGE MODELS
COMPOSITE MODELS
COUPLING
DENSITY MATRIX
ELEMENTARY PARTICLES
FERMIONS
FINAL-STATE INTERACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELICITY
HYPERONS
INTERACTIONS
INTERMEDIATE COUPLING
L-S COUPLING
LAMBDA PARTICLES
MATHEMATICAL MODELS
MATRICES
NUCLEON-ANTINUCLEON INTERACTIONS
OBE MODEL
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PERIPHERAL MODELS
PROTON-ANTIPROTON INTERACTIONS
QUARK MODEL
REGGE POLES
STRANGE PARTICLES
T CHANNEL
A=1-5
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
653007 -- Nuclear Theory-- Nuclear Models-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIBARYONS
ANTIHYPERONS
ANTILAMBDA PARTICLES
ANTIMATTER
ANTIPARTICLES
BARYON-BARYON INTERACTIONS
BARYONS
BOSON-EXCHANGE MODELS
COMPOSITE MODELS
COUPLING
DENSITY MATRIX
ELEMENTARY PARTICLES
FERMIONS
FINAL-STATE INTERACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELICITY
HYPERONS
INTERACTIONS
INTERMEDIATE COUPLING
L-S COUPLING
LAMBDA PARTICLES
MATHEMATICAL MODELS
MATRICES
NUCLEON-ANTINUCLEON INTERACTIONS
OBE MODEL
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PERIPHERAL MODELS
PROTON-ANTIPROTON INTERACTIONS
QUARK MODEL
REGGE POLES
STRANGE PARTICLES
T CHANNEL