000001562 001__ 1562
000001562 005__ 20190719145303.0
000001562 037__ $$aBELLE2-TALK-CONF-2019-080
000001562 041__ $$aeng
000001562 088__ $$aBELLE2-TALK-DRAFT-2019-070
000001562 100__ $$aMichel Bertemes
000001562 245__ $$aDark Sector with Belle II
000001562 260__ $$aInvisibles 19$$c2019-06-13
000001562 300__ $$amult. p
000001562 500__ $$a6 min
000001562 520__ $$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. From February to July 2018, the machine has completed a commissioning run, achieved a peak luminosity of $5.5\times 10^{33}$ cm$^{-2}$s$^{-1}$, and Belle II has recorded a data sample of about 0.5 fb$^{-1}$. Main operation of SuperKEKB has started in March 2019. Already this early data set with specifically designed triggers offers the possibility to search for a large variety of dark sector particles in the GeV mass range complementary to LHC and dedicated low energy experiments; these searches will benefit from more data in the process of being accumulated. This poster will review the state of the dark sector searches at Belle II with a focus on the discovery potential of the early data, and show the first results.
000001562 8560_ $$fdoris.yangsoo.kim@desy.de
000001562 8564_ $$uhttps://docs.belle2.org/record/1562/files/BELLE2-TALK-CONF-2019-080.pdf