Measurement of the branching ratio for the decay. tau. sup minus r arrow e sup minus. nu. sub e. nu. sub. tau

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.41.1414· OSTI ID:6850677

Abachi, S; Derrick, M; Kooijman, P; Musgrave, B; Price, L; Repond, J; Sugano, K ^[1]; Blockus, D; Brabson, B; Brom, J; Jung, C; Ogren, H; Rust, D R ^[2]; Cork, B ^[3]; Akerlof, C; Chapman, J; Errede, D; Ken, M T; Meyer, D I; Neal, H ; Nitz, D; Thun, R; Tschirhart, R ^[4]; Baringer, P; Bylsma, B G; DeBonte, R; Koltick, D; Low, E H; McIlwain, R L; Miller, D H; Ng, C R; Shibata, E ^[5]

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1. Argonne National Laboratory, Argonne, Illinois 60439 (USA)
2. Indiana University, Bloomington, Indiana 47405 (USA)
3. Lawrence Berkeley Laboratory, Berkeley, California 94720 (USA)
4. University of Michigan, Ann Arbor, Michigan 48109 (USA)
5. Purdue University, W. Lafayette, Indiana 47907 (USA)

This paper reports a new measurement of the branching ratio for the decay {tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}}. The data were taken with the High Resolution Spectrometer at the SLAC {ital {ital e}}{sup +}{ital e}{sup {minus}} colliding-beam facility PEP, operating at {radical}{ital s}=29 GeV. The result {ital B}({tau}{sup {minus}}{r arrow}{ital e}{sup {minus}}{bar {nu}}{sub {ital e}}{nu}{sub {tau}})=(17.0{plus minus}0.5{plus minus}0.5)%, together with our measurements of the lifetime and the topological branching fractions of the {tau} lepton are compared with theoretical expectations.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6850677
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 41:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BHABHA SCATTERING
BRANCHING RATIO
CHERENKOV COUNTERS
DATA
DECAY
ELASTIC SCATTERING
ELECTRODYNAMICS
ELECTRON NEUTRINOS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FIELD THEORIES
GEV RANGE
GEV RANGE 10-100
HEAVY LEPTONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LIFETIME
LUMINOSITY
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NEUTRINOS
NUMERICAL DATA
OPTICAL PROPERTIES
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PEP STORAGE RINGS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
RADIATION DETECTORS
SCATTERING
STORAGE RINGS
TAU NEUTRINOS
TAU PARTICLES