lambda. production in e/sup +/e/sup -/ annihilations at 29 GeV

Conference · Thu May 01 04:00:00 EDT 1986

OSTI ID:5645603

Abachi, S; Baringer, P; Beltrami, I; Bylsma, B G; DeBonte, R; Koltick, D; Loeffler, F J; Low, E H; McIlwain, R L; Miller, D H

This paper presents measurements of the inclusive production cross sections of ..lambda.. baryons in e/sup +/e/sup -/ annihilations at ..sqrt..s = 29 GeV. The data sample corresponds to an integrated luminosity of 256 pb/sup -1/ collected with the High Resolution Spectrometer at PEP. Comparisons are made to the predictions of the Lund model. The data are well described using a strange diquark suppression parameter, (us/ud)/(s/d), of 0.89 +- 0.10/sub -0.16//sup +0.56/, and the measured ..lambda../sub c/ ..-->.. ..lambda.. + X branching ratio of 23 +- 10%. No polarization is observed in the ..lambda.. decays. 17 refs., 5 figs.

• Research Organization: Purdue Univ., Lafayette, IN (USA); Argonne National Lab., IL (USA); Indiana Univ., Bloomington (USA); Michigan Univ., Ann Arbor (USA); Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: W-31109-ENG-38; AC02-76ER01112; AC03-76SF00098; AC02-76ER01428; AC02-84ER40125
• OSTI ID: 5645603
• Report Number(s): ANL-HEP-CP-86-30; IUHEE-82; UM-HE-86-08; CONF-8707145-1; ON: DE88002984
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYONS
BASIC INTERACTIONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRONS
HYPERONS
INFORMATION
INTERACTIONS
LAMBDA BARYONS
LAMBDA PARTICLES
LEPTON-LEPTON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
POLARIZED PRODUCTS
STRANGE PARTICLES