Study of tau Decays to Four-Hadron Final States with Kaons

Details Study of tau Decays to Four-Hadron Final States with Kaons Study of tau Decays to Four-Hadron Final States with Kaons

2005-01-17

arxiv.org/abs/hep-ex/0501042v1

Phys.Rev.Lett.94:241802,2005

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages postscript, also available from http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PRL

Scientific paper

10.1103/PhysRevLett.94.241802

The tau decays to four hadrons have been studied with the CLEO III detector at the Cornell Electron Storage Ring (CESR) using (7.56 +- 0.15) fb^{-1} of data collected near the Y(4S) resonance. We present the first statistically significant measurements of B(tau- -> K- pi+pi- pi0 nu, excluding K^0) = (7.4 +- 0.8 +- 1.1) x 10^{-4} and B(tau--> K- K+ pi- pi0 nu) = (5.5 +- 1.4 +- 1.2) x 10^{-5}, including the first observation of the decay, tau- -> K- omega nu, with branching fraction (4.1 +- 0.6 +- 0.7) x 10^{-4}. We also publish the first upper limit for B(tau- -> K- K+ K- pi0 nu) < 4.8 (6.1) x 10^{-6} at 90% (95%) confidence level (C.L.).

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