A study of $\tau$ decays involving $\eta$ and $\omega$ mesons

D. Buskulic et al.,I. De Bonis, D. Decamp, P. Ghez, C. Goy,N. Minard,P. Odier, B. Pietrzyk,M. Chmeissani,I. Efthymiopoulos, E. Fernandez,M. Fernandez-Bosman,A. Juste,M. Martinez,S. Orteu,C. Padilla,A. Pascual, I. Riu,F. Sanchez,F. Teubert,A. Colaleo, D. Creanza,M. de Palma,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,G. Bonvicini,P. Bright-Thomas,M. Cattaneo,P. Comas,P. Coyle, H. Drevermann,M. Frank,R. Hagelberg,J. Harvey,P. Janot,B. Jost,E. Kneringer, J. Knobloch,I. Lehraus,G. Lutters,P. Mato,A. Minten,R. Miquel,M. Mir,L. Moneta,T. Oest,A. Pacheco,F. Ranjard,P. Rensing, G. Rizzo,L. Rolandi,D. Schlatter, M. Schmelling, M. Schmitt,O. Schneider,W. Tejessy,A. Venturi,H. Wachsmuth, A. Wagner, Z. Ajaltouni,A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset,B. Michel, S. Monteil, D. Pallin, P. Perret, F. Podlyski,J. Proriol, P. Rosnet

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS（1997）

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摘要

The 132 pb(-1) of data collected by ALEPH from 1991 to 1994 have been used to analyze eta and omega production in 7 decays. The following branching fractions have been measured: B(tau(-) --> nu(tau)omega h(-)) = (1.91 +/- 0.07 +/- 0.06) x 10(-2), B(tau(-) --> nu(tau)omega h(-)pi(0)) = (4.3 +/- 0.6 +/- 0.5) x 10(-3), B(tau(-) --> nu(tau)eta K-) = (2.9(-1.2)(+1.3) +/- 0.7) x 10(-4), B(tau(-) --> nu(tau)eta(h)(-)pi(0)) = (1.8 +/- 0.4 +/- 0.2) x 10(-3) and the 95% C.L. limit B(tau(-) --> nu(tau)eta pi(-)) < 6.2 x 10(-4) has been obtained. The omega pi(-) and eta pi(-)pi(0) rates and dynamics are found in agreement with the predictions made from e(+)e(-) annihilation data with the help of isospin invariance (CVC).

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