FIRST LOOK AT THE TIME-DEPENDENT CP VIOLATION USING EARLY BELLE II DATA

Abstract

Vladimir Chekelian a Max Planck Institute for Physics, Munich, Germany Abstract. The Belle II experiment at the SuperKEKB energy-asymmetric e+e− collider started the first physics run in March 2019 at a center of mass energy corresponding to the mass of the Υ(4S). A first look at the time-dependent CP violation is presented, utilising an early data set comprising 2.6 fb−1 of total luminosity. A new concept of time-dependent fits based on a weighting technique applied to an assistive MC sample of events is presented as well.