000004037 001__ 4037
000004037 005__ 20231226171920.0
000004037 037__ $$aBELLE2-TALK-CONF-2023-196
000004037 041__ $$aeng
000004037 088__ $$aBELLE2-TALK-DRAFT-2023-188
000004037 100__ $$aPaul Feichtinger
000004037 245__ $$aMeasurements of Michel parameters and tests of lepton universality in tau-lepton decays at Belle and Belle II
000004037 260__ $$aThe 17th International Workshop on Tau Lepton Physics$$c2023-12-04
000004037 300__ $$amult. p
000004037 520__ $$aImproved measurements of the standard model properties of the tau provide indirect searches for beyond-the-standard-model physics. The low-background samples of $e^{+} e^{-} \rightarrow \tau^{+} \tau^{-}$ events collected by Belle and Belle II allow such measurements. We present a test of the V-A structure of $\tau \rightarrow \mu \nu \nu$ decays through the determination of the Michel parameters. In addition, latest studies of lepton universality in tau decays are presented.
000004037 8560_ $$fdjaffe@bnl.gov
000004037 8564_ $$uhttps://docs.belle2.org/record/4037/files/BELLE2-TALK-CONF-2023-196.pdf