Precision measurements of τ lepton decays at Belle II

Sumitted to PubDB: 2024-09-04

Category: Talk, Visibility: Public

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Authors Arthur Thaller
Date Aug. 26, 2024
Belle II Number BELLE2-TALK-CONF-2024-114
Abstract The Belle II experiment has collected a 424 fb1 sample of e+e collision data at centre-of-mass energies near the Υ(nS) resonances. This sample contains 389 million e+eτ+τ events, which we use for precision tests of the standard model. We present measurements of leptonic branching fractions, lepton-flavour universality between electrons and muons, the tau mass, and the Cabibbo-Kobayashi-Maskawa matrix element Vus.
Conference XIII International Conference on New Frontiers in Physics

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