We search for the e+e− → γχ_{bJ} (J = 0, 1, 2) processes at center-of-mass energies sqrt{s} = 10.653, 10.701, 10.746, and 10.804 GeV. These data were collected with the Belle II detector at the SuperKEKB collider and correspond to 3.5, 1.6, 9.8, and 4.7 fb−1 of integrated luminosity, respectively. We set upper limits at the 90% confidence level on the Born cross sections for e+e− → γχ_{bJ} at each center-of-mass energy sqrt{s} near 10.746 GeV. The upper limits at 90% confidence level on the Born cross sections for e+e− → γχ_{b1} are significantly smaller than the corresponding measured values for e+e− → ωχ_{b1} and e+e− → π+π−ϒ(2S) at sqrt{s} = 10.746 GeV.
Search for e + e − → γχ_{bJ} (J = 0, 1, 2) near sqrt(s) = 10.746 GeV at Belle II
Gaz, A.;Stroili, R.;
2026
Abstract
We search for the e+e− → γχ_{bJ} (J = 0, 1, 2) processes at center-of-mass energies sqrt{s} = 10.653, 10.701, 10.746, and 10.804 GeV. These data were collected with the Belle II detector at the SuperKEKB collider and correspond to 3.5, 1.6, 9.8, and 4.7 fb−1 of integrated luminosity, respectively. We set upper limits at the 90% confidence level on the Born cross sections for e+e− → γχ_{bJ} at each center-of-mass energy sqrt{s} near 10.746 GeV. The upper limits at 90% confidence level on the Born cross sections for e+e− → γχ_{b1} are significantly smaller than the corresponding measured values for e+e− → ωχ_{b1} and e+e− → π+π−ϒ(2S) at sqrt{s} = 10.746 GeV.| File | Dimensione | Formato | |
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