Inclusive lepton production in hadronic events from e/sup +/e/sup -/ annihilatio at 29 GeV
The production rates of prompt electrons and muons in hadronic events from e/sup +/e/sup -/ annihilation at 29 GeV have been measured. The inclusive rate per hadronic event for leptons with total momenta greater than 2 GeV/c is determined to be (0.033 +/- 0.003 +/- 0.012) for electrons and (0.037 +/- 0.005 +/- 0.008) for muons. The longitudinal and transverse momentum spectra of these leptons are measured. The harder transverse momentum spectrum of leptons from bottom quark decays relative to charm decays allows us to separate the bottom and charm quark contributions to the prompt lepton signal. The longitudinal momentum distributions allow us to study the fragmentation properties of these heavy quarks. For charm quarks we find average semileptonic branching ratios of (6.4 +/- 1.3 +/- 2.8)% into electrons and (8.1 +/- 1.6 +/- 1.8)% into muons. For bottom quarks the average branching ratios of (12.9 +/- 2.5 +/- 2.0)% into electrons and (12.2 +/- 5.0 +/- 3.0)% into muons have been found. The fragmentation function for bottom quarks is determined to be peaked at large z with /sub b/ approx. = 0.75.
- Research Organization:
- California Univ., Berkeley (USA)
- OSTI ID:
- 5670334
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Properties of heavy quark jets produced by e/sup +/e/sup -/ annihilation at 29 GeV
Properties of heavy quark jets produced by e/sup +/e/sup -/ annihilation at 29 GeV
Related Subjects
ELECTRON-POSITRON INTERACTIONS
PARTICLE PRODUCTION
ELECTRONS
MUONS
ANNIHILATION
B MESONS
BRANCHING RATIO
CHARM PARTICLES
EXPERIMENTAL DATA
GEV RANGE 10-100
LONGITUDINAL MOMENTUM
QUARKS
SEMILEPTONIC DECAY
TRANSVERSE MOMENTUM
BASIC INTERACTIONS
BOSONS
DATA
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LINEAR MOMENTUM
MESONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
WEAK PARTICLE DECAY
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties
645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties