Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

Partial-wave analysis of $\tau^-\to\pi^-\pi^-\pi^+\nu_\tau$ at Belle

Jun 8, 2023, 3:15 PM
DAD - Room 5L (Genova, Italy)

DAD - Room 5L

Genova, Italy

Invited Light meson spectroscopy Light meson spectroscopy


Andrei Rabusov (Technical University of Munich)


I present preliminary results of a partial-wave analysis of $\tau^-\to\pi^-\pi^-\pi^+\nu_\tau$ in data from the Belle experiment at the KEK $\mathrm{e}^+\mathrm{e}^-$ collider. I demonstrate the presence of the $\mathrm{a}_1(1420)$ and $\mathrm{a}_1(1640)$ resonances in $\tau$ decay and measure their parameters. I also present validation of our findings using a model-independent approach. These results can improve modeling in simulation studies necessary for measuring the $\tau$ electric and magnetic dipole moments and Michel parameters.

Primary author

Andrei Rabusov (Technical University of Munich)

Presentation materials

Peer reviewing