Study of the Decay τ^-→2π^-π⁺3π⁰ν_τ

Authors

S. Anderson, University of Minnesota - Minneapolis
Kenneth A. Bloom, University of Nebraska-LincolnFollow
CLEO Collaboration

Date of this Version

11-17-1997

Comments

Published by American Physical Society. Phys. Rev. Lett. 79, 3814 (1997). Permission to use. http://prl.aps.org/. Copyright © 1997 American Physical Society.

Abstract

The decay τ^-→2π^-π⁺3π⁰ν_τ has been studied with the CLEO II detector at the Cornell Electron Storage Ring. The branching fraction is measured to be (2.85 ± 0.56 ± 0.51) X 10^-4. The result is in good agreement with the isospin expectation but somewhat below the conserved-vectorcurrent prediction. We have searched for resonance substructure in the decay. Within the statistical precision, the decay is saturated by the channels τ^-→π^-2π⁰ων_τ, 2π^-π⁺ων_τ, and π^-2π⁰ων_τ This is the first observation of this ω decay mode and the branching fraction is measured to be (1.89_-0.67^+0.74 ± 0.40) X 10^-4.