Eldar Ganiev | Searcharxiv

arXiv2021

Early charmless $B$ physics at Belle II

We report on the first measurements of branching fractions, CP-violating charge asymmetries, and longitudinal polarization fractions in charmless $B$ decays at the Belle II experiment. We use a sample of electron-positron collisions collected in 2019 and 2020 at the $Υ(4S)$ resonance that corresponds to 34.6 fb$^{-1}$ of integrated luminosity. The results are compatible with the known values, which indicates a good understanding of detector performance.

hep-ex↗

arXiv2020

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 $B$-factory. 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 $B^{-}\to D^{(*)0}π^{-}$, $B^{0}\to D^{-}K^{+}$, and $B^{0}\to K^{+}π^{-}$ in the first data set corresponding to 5.15 fb$^{-1}$. These results show a remarkable level of early understanding of detector performance.

hep-ex↗