Search for the Decay $τ^{-}\to 4pi^{-}3π^{+}(π^{0})ν_τ$

Details Search for the Decay $τ^{-}\to 4pi^{-}3π^{+}(π^{0})ν_τ$ Search for the Decay $τ^{-}\to 4pi^{-}3π^{+}(π^{0})ν_τ$

1997-07-15

arxiv.org/abs/hep-ex/9707029v1

Phys.Rev.D56:5297-5300,1997

Physics

High Energy Physics

High Energy Physics - Experiment

9 page postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevD.56.R5297

We have searched for the decay of the tau lepton into seven charged particles and zero or one pi0. The data used in the search were collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR) and correspond to an integrated luminosity of 4.61 fb^(-1). No evidence for a signal is found. Assuming all the charged particles are pions, we set an upper limit on the branching fraction, B(tau- -> 4pi- 3pi+ (pi0) nu_tau) < 2.4 x 10^(-6) at the 90% confidence level. This limit represents a significant improvement over the previous limit.

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