Inclusive lepton production in hadronic events from e/sup +/e/sup -/ annihilation at 29 GeV
We have measured the production rates of prompt electrons and muons in hadronic events from e/sup +/e/sup -/ annihilation at 29 GeV. 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. We measure the longitudinal and transverse momentum spectra of these leptons. The harder transverse momentum spectrum of leptons from bottom and charm quark 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 we find average branching ratios of (12.9 +- 2.5 +- 2.0)% into electrons and (12.2 +- 5.0 +- 3.0)% into muons. The fragmentation function for bottom quarks is determined to be peaked at large z with /sub b/ approx. = 0.75. 46 references.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5540976
- Report Number(s):
- LBL-16724; ON: DE84003893
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Thesis
- 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
ANNIHILATION
PARTICLE PRODUCTION
ELECTRONS
MUONS
CROSS SECTIONS
DRIFT CHAMBERS
EXPERIMENTAL DATA
FRAGMENTATION
GEV RANGE 10-100
HADRONS
INCLUSIVE INTERACTIONS
LEPTONS
PARTICLE IDENTIFICATION
QUARKS
SEMILEPTONIC DECAY
SHOWER COUNTERS
BASIC INTERACTIONS
DATA
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
POSTULATED PARTICLES
PROPORTIONAL COUNTERS
RADIATION DETECTORS
WEAK PARTICLE DECAY
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties