000001453 001__ 1453
000001453 005__ 20190610075715.0
000001453 037__ $$aBELLE2-TALK-CONF-2019-048
000001453 041__ $$aeng
000001453 088__ $$aBELLE2-TALK-DRAFT-2019-042
000001453 100__ $$aStefano Lacaprara
000001453 245__ $$aFirst look at time-dependent CP violation using early Belle II data
000001453 260__ $$aFPCP 2019$$c2019-05-08
000001453 300__ $$amult. p
000001453 500__ $$a12+3 min
000001453 520__ $$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 × 1035 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 × 1033 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. This early data set is used to establish the performance of the detector in terms of reconstruction efficiency of final states of interest for the measurement of time dependent CP violation, such as J/ψK(∗)0 , η 0Ks, and φKs. A first assessment of the B flavor tagging capabilities of the experiment will be given, along with estimates of the Belle II sensitivity to the CKM angles φ1/β and φ2/α and to potential New Physics contributions in penguin amplitudes dominated decays and in b → sγ transitions.
000001453 8560_ $$fdoris.yangsoo.kim@desy.de
000001453 8564_ $$uhttps://docs.belle2.org/record/1453/files/BELLE2-TALK-CONF-2019-048.pdf