Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 58: QCD (Exp.) 2

T 58.7: Talk

Wednesday, March 23, 2022, 17:45–18:00, T-H17

Partial wave analysis of the τ→3πν_τ decay at Belle — •Andrei Rabusov, Daniel Greenwald, and Stephan Paul — TUM, Munich, Germany

The COMPASS collaboration observed a potential new particle, the a₁(1420), that doesn’t fit the quark model. An independent study of the existence of this particle, as well as the studies of the light axial and pseudoscalar resonances, can be done in the tauon decay to three pions and a tau neutrino. The latest such study was published by the CLEO II collaboration in 1999 by analyzing 51000 data events. That study can be significantly improved at B-factories, which collected tens of millions events of this decay. We present data selection criteria, acceptance studies, and partial wave analysis of the τ→3πν_τ decay with the Belle detector.