Dark sector searches with tau-pair events at Belle and Belle II

Sumitted to PubDB: 2023-12-26

Category: Talk, Visibility: Public

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Authors	Sourav Dey
Date	Dec. 4, 2023
Belle II Number	BELLE2-TALK-CONF-2023-199
Abstract	The existence and unknown nature of dark matter motivate dark sector searches at accelerators. The Belle and Belle II experiments enable dark sector searches in the sub-GeV mass region. We search for lepton-flavor-violating tau decays of type tau to l alpha, where l is e/mu and alpha is an invisible particle. We also search for the existence of a heavy neutrino in tau decays. Finally, we present a recent search for a dark, leptophilic scalar particle produced in association with pairs at Belle.
Conference	The 17th International Workshop on Tau Lepton Physics