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First observation of the decay tau(-)-> K*(-)eta nu(tau)

Ammar, Raymond G.
; 
Baringer, Philip S.
; 
Bean, Alice
; 
Besson, David Zeke
; 
Coppage, Don
; 
Darling, C.
; 
Davis, Robin E. P.
; 
Kotov, S.
; 
Kravchenko, I.
; 
Kwak, Nowhan
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Abstract
The decay tau(-) --> K*(-) eta nu(tau) has been observed with the CLEO II detector. The K*(-) is reconstructed in two decay channels, K*(-) -->, KSpi- --> pi(-)pi(+)pi(-) and K*(-) --> K- pi(0). The eta is reconstructed from the decay eta --> gamma gamma. The measured branching fraction is B(tau(-) --> K- pi(0)eta nu(tau)) = (2.9 +/- 0.8 +/- 0.3) x 10(-4). We also measure the inclusive branching fractions without requiring the K* resonance, B(tau(-) --> K(S)pi(-) eta nu(tau)) = (1.10 +/- 0.35 +/- 0.11) x 10(-4) and B(tau(-) --> K- pi(0)eta nu(tau)) = (1.77 +/- 0.56 +/- 0.71) x 10(-4). The results indicate that the K*(-) resonance dominates the K(S)pi(-) mass spectrum.
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1999-01
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AMERICAN PHYSICAL SOC
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Physics & Astronomy Scholarly Works
Center for Russian, East European, and Eurasian Studies Scholarly Publications
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Bishai, M, Chen, S, et al. First observation of the decay tau(-)-> K*(-)eta nu(tau). PHYSICAL REVIEW LETTERS. January 1999. 82(2) : 281-285
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https://hdl.handle.net/1808/1381
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