Electronic branching ratio of the. tau. lepton

Journal Article · Mon Jun 01 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.3976· OSTI ID:7106179

Ammar, R; Baringer, P; Coppage, D; Davis, R; Kelly, M; Kwak, N; Lam, H; Ro, S; Kubota, Y; Lattery, M; Nelson, J K; Perticone, D; Poling, R; Schrenk, S; Wang, R; Alam, M S; Kim, I J; Nemati, B; Romero, V; Sun, C R ; Wang, P; Zoeller, M M; Crawford, G; Fulton, R; Gan, K K; Kagan, H; Kass, R; Lee, J; Malchow, R; Morrow, F; Sung, M K; Whitmore, J; Wilson, P; Butler, F; Fu, X; Kalbfleisch, G; Lambrecht, M; Skubic, P; Snow, J; Wang, P; Bortoletto, D; Brown, D N; Dominick, J; McIlwain, R L; Miller, D H; Modesitt, M; Shibata, E I; Schaffner, S F; Shipsey, I P.J.; Battle, M; Ernst, J; Kroha, H; Roberts, S; Sparks, K; Thorndike, E H; Wang, C; Stroynowski, R; Artuso, M; Goldberg, M; Haupt, T; Horwitz, N; Kennett, R; Moneti, G C; Playfer, S; Rozen, Y; Rubin, P; Skwarnicki, T; Stone, S; Thulasidas, M; Yao, W; Zhu, G; Barnes, A V; Bartelt, J; Csorna, S E; Jain, V; Letson, T; Mestayer, M D; Akerib, D S; Barish, B; Chadha, M

Using data accumulated by the CLEO I detector operating at the Cornell Electron Storage Ring, we have measured the ratio {ital R}={Gamma}({tau}{r arrow}{ital e}{bar {nu}}{sub {ital e}}{nu}{sub {tau}})/{Gamma}{sub 1}, where {Gamma}{sub 1} is the {tau} decay rate to final states with one charged particle. We find {ital R}=0.2231{plus minus}0.0044{plus minus}0.0073 where the first error is statistical and the second is systematic. Together with the measured topological one-charged-particle branching fraction, this yields the branching fraction of the {tau} lepton to electrons, {ital B}{sub {ital e}}=0.192{plus minus}0.004{plus minus}0.006.

• OSTI ID: 7106179
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 45:11; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
TAU PARTICLES
LEPTONIC DECAY
BRANCHING RATIO
CESR STORAGE RING
CHARGED PARTICLES
COUPLING CONSTANTS
ELECTRONS
EXPERIMENTAL DATA
LIFETIME
MONTE CARLO METHOD
PARTICLE PRODUCTION
QUANTUM ELECTRODYNAMICS
RADIATION DETECTORS
STANDARD MODEL
BASIC INTERACTIONS
DATA
DECAY
ELECTRODYNAMICS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HEAVY LEPTONS
INFORMATION
INTERACTIONS
LEPTONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
STORAGE RINGS
UNIFIED GAUGE MODELS
WEAK INTERACTIONS
WEAK PARTICLE DECAY
662370* - Decays of Leptons- (1992-)
662220 - Quantum Electrodynamics- (1992-)