BELLE2-TALK-DRAFT-2020-077 BELLE2-TALK-CONF-2021-005

Early Belle II measurements of the tau lifetime

Stefano Moneta

07 January 2021
XXVII Cracow EPIPHANY Conference on Future of particle physics

Abstract: The tau-lepton lifetime represents a fundamental parameter within the Standard Model framework, contributing to the test of lepton flavor universality. As the present tau lifetime uncertainty is below 0.2%, a competitive measurement is particularly challenging. The method proposed for the Belle II experiment exploits the tiny beam spot size at the interaction point obtained through the new collision scheme of SuperKEKB. By this method, a competitive statistical uncertainty could already be reached with early Belle II data.

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 Record created 2021-02-02, last modified 2021-02-02


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