Measurement of the decay [tau][sup [minus]][r arrow][pi][sup [minus]][pi][sup +][pi][sup [minus]]2[pi][sup 0][nu][sub [tau]]

Journal Article · Mon Sep 20 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.1791· OSTI ID:6110014

Bortoletto, D; Brown, D N; Fast, J; McIlwain, R L; Miao, T; Miller, D H; Modesitt, M; Schaffner, S F; Shibata, E I; Shipsey, I P.J.; Wang, P N; Battle, M; Ernst, J; Kroha, H; Roberts, S; Sparks, K; Thorndike, E H; Wang, C H; Dominick, J; Sanghera, S ; Skwarnicki, T; Stroynowski, R; Artuso, M; He, D; Goldberg, M; Horwitz, N; Kennett, R; Moneti, G C; Muheim, F; Mukhin, Y; Playfer, S; Rozen, Y; Stone, S; Thulasidas, M; Vasseur, G; Zhu, G; Bartelt, J; Csorna, S E; Egyed, Z; Jain, V; Sheldon, P; Akerib, D S; Barish, B; Chadha, M; Chan, S; Cowen, D F; Eigen, G; Miller, J S; O'Grady, C; Urheim, J; Weinstein, A J; Acosta, D; Athanas, M; Masek, G; Ong, B; Paar, H; Sivertz, M; Bean, A; Gronberg, J; Kutschke, R; Menary, S; Morrison, R J; Nakanishi, S; Nelson, H N; Nelson, T K; Richman, J D; Ryd, A; Tajima, H; Schmidt, D; Sperka, D; Witherell, M S; Procario, M; Yang, S; Balest, R; Cho, K; Dauodi, M; Ford, W T; Johnson, D R

The decay [tau][sup [minus]][r arrow][pi][sup [minus]][pi][sup +][pi][sup [minus]]2[pi][sup 0][nu][sub [tau]] has been observed in [ital e][sup +][ital e[minus]] annihilation using the CLEO II detector at the Cornell Electron Storage Ring. In a data sample collected at [radical][ital s] [similar to]10.6 GeV, 668[plus minus]38 decay candidates have been identified by exclusively reconstructing two [pi][sup 0]'s accompanying three charged particles, which are assumed to be pions. Normalizing to the number of [tau] pairs detected with one charged particle recoiling against three charged particles, this yields a branching ratio of [ital B][sub 3[pi]2[pi]][sup 0]=(0.48[plus minus]0.04[plus minus]0.04)%. A signal of 430[plus minus]33 events for the decay [tau][sup [minus]][r arrow][pi][sup [minus]][omega][pi][sup 0][nu][sub [tau]] has also been observed, corresponding to a branching ratio of [ital B][sub [pi][omega][pi]][sup 0]=(0.39[plus minus]0.04[plus minus]0.04)%.

• OSTI ID: 6110014
• Journal Information: Physical Review Letters; (United States), Vol. 71:12; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
TAU PARTICLES
PARTICLE DECAY
BRANCHING RATIO
CHARGED PARTICLES
MASS SPECTRA
PIONS
QUANTUM ELECTRODYNAMICS
STORAGE RINGS
TAU NEUTRINOS
BOSONS
DECAY
ELECTRODYNAMICS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
HEAVY LEPTONS
LEPTONS
MASSLESS PARTICLES
MESONS
NEUTRINOS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
SPECTRA
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