Speaker
Stefan Wallner
(Max Planck Institute for Physics)
Description
We present a partial-wave analysis of $\tau^{-} \rightarrow \pi^{-} \pi^{-} \pi^{+} \nu_\tau$ decays using the world's largest sample of these decays from the Belle experiment at KEK, Japan; and we discuss challenges of this analysis. We give preliminary results on light-meson resonances appearing in the $\pi^{-} \pi^{-} \pi^{+}$system, including $a_1(1420)$, and in the $\pi^{-} \pi^{+}$subsystem, measured using the so-called freed-isobar method; and we give prospects for spectroscopy measurements at Belle II.
Author
Stefan Wallner
(Max Planck Institute for Physics)
