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 04:00:00 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), Journal Name: Physical Review Letters; (United States) Vol. 71:12; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

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