The 16th International Workshop on Tau Lepton Physics (TAU2021) (Virtual Edition)

Session

Poster session: Breakout room 1

1 Oct 2021, 10:50

Virtual (Indiana University)

28. Tau lifetime measurement at Belle II

Stefano Moneta (INFN - National Institute for Nuclear Physics)

01/10/2021, 10:50

Tau2021 Abstracts

Poster contribution

The tau-lepton lifetime represents a fundamental parameter within the Standard Model framework, contributing to the test of lepton flavor universality. Exploiting the vertex detector resolution and the tiny beam spot size at the interaction point, Belle II is expected to improve the present tau-lifetime value. The event topology where one tau decays to three charged pions (3-prong) and the...

27. The tau mass measurement at Belle II

Navid Khandan Rad (Deutsches Elektronen-Synchrotron DESY)

01/10/2021, 10:50

Tau2021 Abstracts

Poster contribution

Using the Belle II data from the early Phase III data taking, we reconstructed the tau
leptons using the 3-prong τ decays. This decay mode is used for the tau-lepton mass
measurement using the pseudomass technique developed by the ARGUS experiment. Though
this measurement is expected to be limited by statistics and imperfect knowledge of
the detector performance, we foresee that Belle II...