HADRON2023

Partial-wave analysis of τ−→π−π−π+ντ at Belle

8 Jun 2023, 15:15

20m

DAD - Room 5L (Genova, Italy)

Invited Light meson spectroscopy Light meson spectroscopy

Speaker

Andrei Rabusov (Technical University of Munich)

Description

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.

Presentation materials

tau3pi-PWA-HADRON2023.pdf

Peer reviewing

Paper

Accepted on 15 Dec 2023 by Mikhail Osipenko

Paper files:

• a11260.eps
• a11420.eps
• BELLE-tau3pi-PWA.tex
• BELLE-tau3pi-PWA.pdf
• license.pdf