000003766 001__ 3766
000003766 005__ 20230731205121.0
000003766 037__ $$aBELLE2-TALK-CONF-2023-107
000003766 041__ $$aeng
000003766 088__ $$aBELLE2-TALK-DRAFT-2023-096
000003766 100__ $$aSavino Longo
000003766 245__ $$aRecent dark-sector and tau physics results at Belle II
000003766 260__ $$a31st International Symposium on Lepton Photon Interactions at High Energies$$c2023-07-17
000003766 300__ $$amult. p
000003766 520__ $$aBelle has unique reach for a broad class of models that postulate the existence of dark matter particles with MeV—GeV masses. In addition, the low-background environment of electron-positron collisions and an hermetic detector make Belle II the premier experiment for studying tau-lepton physics. This talk presents recent world-leading results from Belle II searches for Z` dark decays and long-lived (pseudo) scalars in B decays. In addition, the world’s most precise determination of the tau lepton mass and searches for tau decays into a scalar non-SM particle and a lepton are reported.
000003766 8560_ $$fdjaffe@bnl.gov
000003766 8564_ $$uhttps://docs.belle2.org/record/3766/files/BELLE2-TALK-CONF-2023-107.pdf