Electron-muon and electron-hadron production in e/sup +/e/sup -/ collisions
Journal Article
·
· Phys. Rev. Lett.; (United States)
We observe anomalous e..mu.. and e-hadron events in e/sup +/e/sup -/ collisions at SPEAR in an experiment that uses a lead-glass counter system to identify electrons. The anomalous events are observed in the two-charged-prong topology. Their properties are consistent with the production of a pair of heavy leptons in the reaction e/sup +/e/sup -/ ..-->.. tau/sup +/tau/sup -/ with subsequent decays of tau/sup + -/into leptons and hadrons. Under the assumption that they come only from this source, we measure the branching ratios B (tau ..-->.. e..nu../sub e/..nu../sub tau)/ = (22.4 +- 5.5) % and B (tau ..-->.. h + neutrals) = (45 +- 19) %.
- Research Organization:
- Lawrence Berkeley Laboratory and Department of Physics, University of California, Berkeley, California 94720
- OSTI ID:
- 7277748
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 39:17; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BASIC INTERACTIONS
BRANCHING RATIO
CROSS SECTIONS
DECAY
DISTRIBUTION
ELECTRODYNAMICS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HEAVY LEPTONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONIC DECAY
LEPTONS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
POSTULATED PARTICLES
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
WEAK INTERACTIONS
645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BASIC INTERACTIONS
BRANCHING RATIO
CROSS SECTIONS
DECAY
DISTRIBUTION
ELECTRODYNAMICS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HEAVY LEPTONS
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONIC DECAY
LEPTONS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
POSTULATED PARTICLES
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
WEAK INTERACTIONS