BELLE2-TALK-DRAFT-2021-105 BELLE2-TALK-CONF-2021-109

Latest results on the dark sector and tau physics at Belle II

Ewan Hill

19 August 2021
20th Lomonosov Conference

Abstract: The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $6\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. The first results on dark sector searches for axion-like particles, Z’ and dark photons will be described. In addition, the status and prospects for tau property measurements and searches for lepton-flavour violating tau decays.

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