Lambda production in e/sup +/e/sup -/ annihilations at 29 GeV

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5678571

Baringer, P S

Data taken with the High Resolution Spectrometer at the Stanford Linear Accelerator Centers's PEP facility, during the 1981-82, and 1982-83 running cycles were analyzed for this thesis. Events characteristic of the process of an electron and positron annihilating into a single photon, with the photon subsequently materializing as a quark and an antiquark, were selected from the data set. In these e/sup +/e/sup -/ annihilations, the quarks dress themselves with other quarks, and appear physically as a jet of particles. How the quarks dress themselves in what is called the fragmentation process, is very poorly understood. A particle called the lambda, which consists of three quarks, was chosen to study this process, because it carries two important quantum numbers - baryon number, and strangeness - which are known to be conserved by the force governing fragmentation. Various characteristics of the creation of the lambdas within the particle jets are examined, and implications for models of quark fragmentation are drawn.

• Research Organization: Indiana Univ., Bloomington (USA)
• OSTI ID: 5678571
• 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
BARYONS
DATA
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRONS
HYPERONS
HYPOTHESIS
INFORMATION
INTERACTIONS
JET MODEL
LAMBDA BARYONS
LAMBDA PARTICLES
LEPTON-LEPTON INTERACTIONS
LIMITING FRAGMENTATION
MATHEMATICAL MODELS
MULTIPLE PRODUCTION
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PEP STORAGE RINGS
POSTULATED PARTICLES
QUARKS
STORAGE RINGS
STRANGE PARTICLES