sup 3 P sub 0 and sup 3 S sub 1 contributions to p p yields. Lambda. Lambda

Conference · Sat Dec 31 23:00:00 EST 1988

OSTI ID:5400152

Alberg, M. A.; Henley, E. M.; Wilets,; Kunz, P. D. ^[1]

---

1. Seattle Univ., WA (USA). Dept. of Physics

We have proposed a quark model for {bar N}N annihilation which consists of a linear superposition of the so-called {sup 3}P{sub 0} (scalar) and {sup 3}S{sub 1} (vector) models. We have argued that this approach is more consistent with QCD and the analogous NN system than the use of either model alone. Recent precise measurements of the {bar p}p {yields} {bar {Lambda}}{Lambda} reaction by the PS185 collaboration at LEAR provide a test of this model. Ad advantage of strange baryon production is the polarization information that can be obtained due to their weak decays. Spin effects are known to be more sensitive to details of the reaction mechanism. In this paper we present the results of distorted wave calculation for the production of {bar {Lambda}}{Lambda}; distortion effects due to real and imaginary (absorptive) potentials in both initial and final states are included. Our results at p{sub lab} = 1.5075 GeV/c and p{sub lab} = 1.564 GeV/c show that the best fits to the differential cross section and polarization data are obtained with an interference between scalar and vector terms. The sensitivity of our results to the parameters of the {bar {Lambda}}{Lambda} potential indicates that this reaction may be used to provide information about the hyperon-antihyperon interaction, about which very little is known. 10 refs., 4 figs.

• Research Organization: Washington Univ., Seattle, WA (USA). Dept. of Physics
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG06-88ER40427
• OSTI ID: 5400152
• Report Number(s): DOE/ER/40427-17-N9; CONF-8907127--5; ON: DE90003334
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BARYONS
COMPOSITE MODELS
CROSS SECTIONS
DISTORTED WAVE THEORY
ELEMENTARY PARTICLES
ENERGY LEVELS
EXCITED STATES
FERMIONS
FINAL-STATE INTERACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
LAMBDA BARYONS
LAMBDA PARTICLES
LINEAR MOMENTUM
MATHEMATICAL MODELS
NUCLEON-ANTINUCLEON INTERACTIONS
ORIENTATION
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PROTON-ANTIPROTON INTERACTIONS
QUARK MODEL
SPIN ORIENTATION
STRANGE PARTICLES