Speaker
Sourav Dey
(KEK)
Description
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 $\tau \to \ell \alpha$, where $\ell = e, \mu$ 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 $\tau^+\tau^-$ pairs at Belle.
Name of collaboration or list of co-authors
Belle and Belle II
Primary author
Sven Vahsen
(University of Hawaii (US))
