000004355 001__ 4355
000004355 005__ 20240531194048.0
000004355 037__ $$aBELLE2-TALK-CONF-2024-064
000004355 041__ $$aeng
000004355 088__ $$aBELLE2-TALK-DRAFT-2024-071
000004355 100__ $$aStefan Wallner
000004355 245__ $$aAmplitude analysis of tau -> 3pi at Belle (II)
000004355 260__ $$aInternational Workshop on Partial Wave Analyses and Advanced Tools for Hadron Spectroscopy$$c2024-05-28
000004355 300__ $$amult. p
000004355 520__ $$aWe present a partial-wave analysis of $\tau^-\to \pi^-\pi^-\pi^+ \nu_\tau$ decays using the world`s largest sample of these decays from the Belle experiment at KEK, Japan. We discuss the employed covariant tensor formalism and the treatment of large incoherent backgrounds in our sample. We give preliminary results on light-meson resonances appearing in the $\pi^-\pi^-\pi^+$ system, including $a_1(1420)$, and in the $\pi^-\pi^+$ subsystem, measured using the so-called freed-isobar method; and we give prospects for measurements at Belle II.
000004355 8560_ $$fdjaffe@bnl.gov
000004355 8564_ $$uhttps://docs.belle2.org/record/4355/files/BELLE2-TALK-CONF-2024-064.pdf