Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle II collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara
| Summary:
We study the processes $e^+e^-toomegachi_{bJ}(1P)$ ($J$ = 0, 1, or 2)
using samples at center-of-mass energies $sqrt{s}$ = 10.701, 10.745, and
10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb$^{-1}$ of integrated
luminosity, respectively. These data were collected with the Belle II detector
during a special run of the SuperKEKB collider above the $Upsilon(4S)$
resonance. We report the first observation of $omegachi_{bJ}(1P)$ signals at
$sqrt{s}$ = 10.745 GeV. By combining Belle II data with Belle results at
$sqrt{s}$ = 10.867 GeV, we find energy dependencies of the Born cross sections
for $e^+e^-to omegachi_{b1,b2}(1P)$ to be consistent with the shape of the
$Upsilon(10753)$ state. Including data at $sqrt{s}$ = 10.653 GeV, we also
search for the bottomonium equivalent of the $X(3872)$ state decaying into
$omegaUpsilon(1S)$. No significant signal is observed for masses between
10.45 and 10.65 GeV/$c^2$.
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