We report a comparison of the Dalitz-plot distributions of 1.6 million τ+ decays (K+→π+π+π-) and an equal number of τ- decays. No significant asymmetry has been found in any region of the plot. In terms of the difference in the slope parameters a+ and a- for the odd-pion c.m.-energy spectra, the asymmetry is Δ=(a+-a-)(a++a-)=-0.0070±0.0053. We also present a preliminary result for the slope parameter itself: a=0.283±0.005. New measurements of the τ± decay rates and their difference confirm previous results.
ASJC Scopus subject areas
- Physics and Astronomy(all)