Measurements of Michel parameters and tests of lepton universality in tau-lepton decays at Belle and Belle II

Sumitted to PubDB: 2023-12-26

Category: Talk, Visibility: Public

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Authors	Paul Feichtinger
Date	2023-12-04
Belle II Number	BELLE2-TALK-CONF-2023-196
Abstract	Improved measurements of the standard model properties of the tau provide indirect searches for beyond-the-standard-model physics. The low-background samples of $e^{+} e^{-} \to τ^{+} τ^{-}$ events collected by Belle and Belle II allow such measurements. We present a test of the V-A structure of $τ \to μ ν ν$ decays through the determination of the Michel parameters. In addition, latest studies of lepton universality in tau decays are presented.
Conference	The 17th International Workshop on Tau Lepton Physics