Meson-exchange and quark-gluon transitions in the p p r arrow. Lambda. Lambda. process

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.2158· OSTI ID:6949468

Haidenbauer, J ^[1]; Holinde, K; Mull, V; Speth, J ^[2]

---

1. Department of Physics and Mathematical Physics, University of Adelaide, Adelaide 5001 (Australia)
2. Institut fuer Kernphysik, Forschungszentrum Juelich GmbH,W-5170 Juelich (Germany)

Different {ital {bar p}p}{r arrow}{bar {Lambda}}{Lambda} transition mechanisms ({ital K}+{ital K}{sup *} exchange, {ital K} exchange only, and quark-gluon exchange ({sup 3}{ital S}{sub 1} version)) are investigated in a full coupled-channel ({ital {bar p}p},{bar {Lambda}}{Lambda}) calculation. The elastic part of the {ital {bar p}p} and {bar {Lambda}}{Lambda} interactions has been derived from a one-boson-exchange version of the Bonn {ital NN} potential and a corresponding extension to the hyperon-nucleon case whereas the annihilation part is taken into account by phenomenological optical potentials. As expected, results for spin observables differ substantially for the different transition models. It turns out that resulting polarizations and spin correlation parameters are quite sensitive to variations in the initial- and final-state interactions whereas spin-transfer parameters are much more stable in this regard. Therefore, the latter observables, especially the depolarization {ital D}{sub {ital n}{ital n}}, can be used to discriminate between various transition scenarios.

• OSTI ID: 6949468
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 46:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663430 -- Nucleon-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BARYON-BARYON INTERACTIONS
BARYONS
BOSON-EXCHANGE MODELS
BOSONS
COUPLED CHANNEL THEORY
ELEMENTARY PARTICLES
FERMIONS
GLUONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERNUCLEI
HYPERONS
INTERACTIONS
KAONS
LAMBDA BARYONS
MATHEMATICAL MODELS
MESONS
NUCLEAR FRAGMENTS
NUCLEI
NUCLEON-ANTINUCLEON INTERACTIONS
NUCLEON-NUCLEON POTENTIAL
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PERIPHERAL MODELS
POLARIZATION
POSTULATED PARTICLES
POTENTIALS
PROTON-ANTIPROTON INTERACTIONS
PSEUDOSCALAR MESONS
QUARKS
SPIN
STRANGE MESONS
STRANGE PARTICLES