Hadronic B decay reconstruction in early Belle II data

Belle II is an experiment designed to study billions of τ-lepton, b- and c-quark decays observed with low background in asymmetric-energy electron-positron collisions at the SuperKEKB Bfactory. In March 2019, the newly completed Belle II started operating and collected its first physics data reaching 10 fb−1 to date. We report the reconstruction of prominent signals from various hadronic B decays including B− → D(∗)0π−, B0 → D−K+, and B0 → K+π− in the first data set corresponding to 5.15 fb−1. These results show a remarkable level of early understanding of detector performance.