Jia S. et al.Wang, X.L.X.L.WangShen, C.P.C.P.ShenYuan, C.Z.C.Z.YuanAdachi, I.I.AdachiAihara, H.H.AiharaAl Said, S.S.Al SaidAsner, D.M.D.M.AsnerAtmacan, H.H.AtmacanAulchenko, V.V.AulchenkoAushev, T.T.AushevPAO-TI CHANG WEI-SHU HOUMIN-ZU WANG2021-07-282021-07-28201824700010https://www.scopus.com/inward/record.uri?eid=2-s2.0-85058113571&doi=10.1103%2fPhysRevD.98.092015&partnerID=40&md5=99fea6bef12e4a3aa781a44a64c4f6cchttps://scholars.lib.ntu.edu.tw/handle/123456789/574677Using data samples of 89.5 fb-1, 711.0 fb-1, and 121.4 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions e+e-→γχcJ (J=0, 1, 2) and e+e-→γηc. A significant γχc1 signal is observed for the first time at s=10.58 GeV with a significance of 5.1σ including systematic uncertainties. No significant excesses for γχc0, γχc2, and γηc final states are found, and we set 90% credibility level upper limits on the Born cross sections (σB) at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of σB(e+e-→γχc1) is obtained. ? 2018 authors. Published by the American Physical Society.[SDGs]SDG7journal article10.1103/PhysRevD.98.0920152-s2.0-85058113571