000001910 001__ 1910
000001910 005__ 20200421172456.0
000001910 037__ $$aBELLE2-TALK-CONF-2020-021
000001910 041__ $$aeng
000001910 088__ $$aBELLE2-TALK-DRAFT-2020-017
000001910 100__ $$aMichel Bertemes
000001910 245__ $$aDark Sector Searches at Belle II
000001910 260__ $$a3d World Summit on Exploring the Dark Side of the Universe$$c2020-03-12
000001910 300__ $$amult. p
000001910 520__ $$aThe Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. During 2018, the machine has completed a commissioning run, recording a data sample of about 0.5 fb$^{-1}$. Main operations started in March 2019 with the complete Belle II detector: an integrated luminosity of 10 fb$^{-1}$ has been collected so far. These early data sets, with specifically designed low multiplicity triggers, offer already the possibility to search for a large variety of dark sector particles in the GeV mass range, complementary to LHC and to dedicated low energy experiments. The talk will review the status of the dark sector searches at Belle II, with a focus on the discovery potential of the early data, and show the first results.
000001910 8560_ $$fdavid.jaffe@desy.de
000001910 8564_ $$uhttps://docs.belle2.org/record/1910/files/BELLE2-TALK-CONF-2020-021.pdf