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| Main Author: | |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.14537 |
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Table of Contents:
- We present recent measurements of $τ$ physics at the Belle II experiment at SuperKEKB. Measurements include a test of $e-μ$ lepton flavor universality in $τ$ decays, a search for the lepton flavor violating $τ\rightarrow μμμ$ decay and a precision measurement of the $τ$ lepton invariant mass. In addition, we present a measurement of the low multiplicity decay cross section $σ(e^+ e^- \rightarrow π^+ π^- π^0)$, a key input in the theoretical prediction of the anomalous magnetic moment of the muon.