Partial-wave analysis of τ → πππ+ντ at BELLE

The Belle Collaboration

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Abstract

We present preliminary results of a partial-wave analysis of τ → πππ+ντ in data from the BELLE experiment at the KEKB e+e collider. We demonstrate the presence of the a1(1420) and a1(1640) resonances in tauon decays and measure their masses and widths. We also present validation of our findings using a model-independent approach. Our results can improve modeling in simulation studies necessary for measuring the tauon electric and magnetic dipole moments and Michel parameters.

Original languageEnglish
Article number154
JournalNuovo Cimento della Societa Italiana di Fisica C
Volume47
Issue number4
DOIs
StatePublished - 2024

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