lambda. production in e/sup +/e/sup -/ annihilations at 29 GeV: comparison with Lund-model predictions

Journal Article · Mon Mar 31 04:00:00 EST 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.56.1346· OSTI ID:5880487

Baringer, P; Abachi, S; Akerlof, C; Beltrami, I; Blockus, D; Bonvicini, G; Brabson, B; Brom, J M; Bylsma, B G; Chapman, J

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 the SLAC storage ring PEP. Comparisons are made to the predictions of the Lund model. The data are well described with use of 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%).

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439; Indiana University, Bloomington, Indiana 47405; Lawrence Berkeley Laboratory, Berkeley, California 94720; University of Michigan, Ann Arbor, Michigan 48109; Purdue University, West Lafayette, Indiana 47907
• DOE Contract Number: W-31109-ENG-38; AC02-76ER01112; AC03-76SF00098; AC02-76ER01428
• OSTI ID: 5880487
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 56:13; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYONS
BASIC INTERACTIONS
BRANCHING RATIO
COMPOSITE MODELS
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXTENDED PARTICLE MODEL
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRONS
HYPERONS
INCLUSIVE INTERACTIONS
INTERACTIONS
LAMBDA BARYONS
LAMBDA PARTICLES
LEPTON-LEPTON INTERACTIONS
MASS SPECTRA
MATHEMATICAL MODELS
MONTE CARLO METHOD
MULTIPLICITY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PEP STORAGE RINGS
QUARK MODEL
SPECTRA
STORAGE RINGS
STRANGE PARTICLES
STRING MODELS