Early Belle II measurements of the tau lifetime

Sumitted to PubDB: 2021-02-02

Category: Talk, Visibility: Public

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Authors	Stefano Moneta
Date	2021-01-07
Belle II Number	BELLE2-TALK-CONF-2021-005
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.
Conference	XXVII Cracow EPIPHANY Conference on Future of particle physics