Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara
| Summary:
We report measurements of the $e^+e^- to Bbar{B}$, $Bbar{B}{}^*$, and
$B^*bar{B}{}^*$ cross sections at four energies, 10653, 10701, 10746 and 10805
MeV, using data collected by the Belle~II experiment. We reconstruct one $B$
meson in a large number of hadronic final states and use its momentum to
identify the production process. In the first $2-5$ MeV above $B^*bar{B}{}^*$
threshold, the $e^+e^- to B^*bar{B}{}^*$ cross section increases rapidly.
This may indicate the presence of a pole close to the threshold.
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