Search for (Formula presented) (J = 0, 1, 2) near (Formula presented) = 10.746 GeV at Belle II

Abstract

We search for the eþe− → γχbJ (J ¼ 0, 1, 2) processes at center-of-mass energies ps ¼ 10.653, 10.701, ffiffi 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 eþe− → γχbJ at each center-of-mass energy pffiffi s near 10.746 GeV. The upper limits at 90% confidence level on the Born cross sections for eþe− → γχb1 are significantly smaller than the corresponding measured values for eþe− → ωχb1 and eþe− → πþπ−ϒð2SÞ at ffiffi ps ¼ 10.746 GeV.