Recent dark-sector and tau physics results at Belle II

Sumitted to PubDB: 2023-07-31

Category: Talk, Visibility: Public

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Authors	Savino Longo
Date	July 17, 2023
Belle II Number	BELLE2-TALK-CONF-2023-107
Abstract	Belle has unique reach for 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 and an hermetic detector make Belle II the premier experiment for studying tau-lepton physics. This talk presents recent world-leading results from Belle II searches for Z` dark decays and long-lived (pseudo) scalars in B decays. In addition, the world’s most precise determination of the tau lepton mass and searches for tau decays into a scalar non-SM particle and a lepton are reported.
Conference	31st International Symposium on Lepton Photon Interactions at High Energies