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October 1, 2026
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Search for e+ e- -> gamma chi_bJ (J = 0, 1, 2) near sqrt(s) = 10.746 GeV at Belle II

Physical Review Letters. 2026. Vol. D. No. 113. Article 052009.
Pakhlova G., Bodrov D., Aushev Т., Abumusabh М.

We search for the e+ e- -> gamma chi_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- -> gamma chi_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- -> gamma chi_b1 are significantly smaller than the corresponding measured values for e+ e- -> omega chi_b1 and e+ e- -> pi+ pi- Upsilon(2S) at sqrt(s) = 10.746 GeV.

Research target: Physics
Language: English
Full text
DOI
Keywords: Belle detector
Publication based on the results of:
Search for New physics in the experiments on e+e- colliders (2025)
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