A study of τ decays involving η and ω mesons

D. Buskulic, I. De Bonis, D. Decamp, P. Chez, C. Goy, J. P. Lees, J. P. Lucotte, M. N. Minard, J. Y. Nief, P. Odier, B. Pietrzyk, M. P. Casado, M. Chmeissani, J. M. Crespo, J. M. Delfino, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, Ll Garrido, A. JusteM. Martinez, S. Orteu, C. Padilla, I. C. Park, A. Pascual, J. A. Perlas, I. Riu, F. Sanchez, F. Teubert, A. Colaleo, D. Creanza, M. Depalma, G. Gelao, M. Girone, G. Iaselli, G. Maggi, M. Maggi, N. Marinelli, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, R. Alemany, A. O. Bazarko, G. Bonvicini, P. Bright-Thomas, M. Cattaneo, P. Comas, P. Coyle, H. Drevermann, R. W. Forty, M. Frank, R. Hagelberg, J. Harvey, P. Janot, B. Jost, E. Kneringer, J. Knobloch, I. Lehraus, G. Lutters, E. B. Martin, P. Mato, A. Minten, R. Miquel, Ll M. Mir, L. Moneta, T. Oest, A. Pacheco, J. F. Pusztaszeri, F. Ranjard, P. Rensing, G. Rizzo, L. Rolandi, D. Schlatter, M. Schmelling, M. Schmitt, O. Schneider, W. Tejessy, I. R. Tomalin, A. Venturi, H. Wachsmuth, A. Wagner, Z. Ajaltouni, A. Barrés, C. Boyer

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Abstract

The 132 pb-1 of data collected by ALEPH from 1991 to 1994 have been used to analyze η and ω production in τ decays. The following branching fractions have been measured: B(τ- → ντωh-) = (1.91 ± 0.07 ± 0.06) × 10-2, B(τ- → ντωh-π0) = (4.3 ± 0.6 ± 0.5) × 10-3, B(τ- → ντηK-) = (2.9-1.2+1.3 ± 0.7) × 10-4, B(τ- → ντηh-π0) = (1.8 ± 0.4 ± 0.2) × 10-3 and the 95% C.L. limit B(τ- → ντηπ-) < 6.2 × 10-4 has been obtained. The ωπ- and ηπ-π0 rates and dynamics are found in agreement with the predictions made from e+e- annihilation data with the help of isospin invariance (CVC). © Springer-Verlag 1997.
Original languageEnglish
Pages (from-to)263-273
JournalZeitschrift fur Physik C-Particles and Fields
Volume74
Issue number2
Publication statusPublished - 1 Jan 1997

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