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Measurement of tau-decays involving eta-mesons
Ammar, Raymond G. ; Ball, S. ; Baringer, Philip S. ; Coppage, Don ; Copty, N. ; Davis, Robin E. P. ; Hancock, N. ; Kelly, M. ; Kwak, Nowhan ; Lam, H.
Ammar, Raymond G.
Ball, S.
Baringer, Philip S.
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kelly, M.
Kwak, Nowhan
Lam, H.
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Abstract
The decay tau- --> nu(tau)pi-pi0eta has been observed for the first time using the CLEO-II detector at the Cornell Electron Storage Ring. The measured branching ratio (0.17 +/- 0.02 +/- 0.02)%, agrees with the CVC (conserved vector current) prediction based on e+e- --> pi+pi-eta data. Upper limits on the branching ratios for other tau decays to final states including eta mesons are improved by an order of magnitude compared to previous measurements.
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1992-12
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AMERICAN PHYSICAL SOC
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ARTUSO, M, GOLDBERG, M.et al. Measurement of tau-decays involving eta-mesons. PHYSICAL REVIEW LETTERS. December 1992. 69(23) : 3278-3281