Recent tau and dark-sector results at Belle II

Sumitted to PubDB: 2023-05-25

Category: Talk, Visibility: Public

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Authors	Zuzana Gruberova
Date	May 14, 2023
Belle II Number	BELLE2-TALK-CONF-2023-063
Abstract	Belle has unique sensitivity to a broad class of models that postulate the existence of dark matter particles with MeV—GeV masses. In addition, the low-background environment of electron-positron collisions along with the large expected sample size and an hermetic detector make Belle II the premier experiment for studying tau-lepton physics. This talk presents recent world-leading physics results from Belle II searches for dark Z’ decays; as well as for long-lived (pseudo) scalars in B decays. Results from Belle II determinations of the tau lepton mass and from searches for tau decays into a scalar non-SM particle and a lepton are also presented.
Conference	34th Rencontres de Blois 2023 - Particle Physics and Cosmology