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arXiv · 2405.14537

Tau and low multiplicity decays at Belle and Belle II

Philipp Horak
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Abstract

We present recent measurements of $\tau$ physics at the Belle II experiment at SuperKEKB. Measurements include a test of $e-\mu$ lepton flavor universality in $\tau$ decays, a search for the lepton flavor violating $\tau \rightarrow \mu \mu \mu$ decay and a precision measurement of the $\tau$ lepton invariant mass. In addition, we present a measurement of the low multiplicity decay cross section $\sigma(e^+ e^- \rightarrow \pi^+ \pi^- \pi^0)$, a key input in the theoretical prediction of the anomalous magnetic moment of the muon.

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Philipp Horak. 2024-05-23. Tau and low multiplicity decays at Belle and Belle II. https://arxiv.org/abs/2405.14537

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