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We present measurements of the Born cross sections for the processes e^+e^-→ωχ₂₁ and ωχ₂₂ at center-of-mass energies sqrts from 4. 308 to 4. 951 GeV. The measurements are performed with data samples corresponding to an integrated luminosity of 11. 0 fb^-1 collected with the BESIII detector operating at the Beijing Electron Positron Collider storage ring. Assuming the e^+e^-→ωχ₂₂ signals come from a single resonance, the mass and width are determined to be M= (4413. 6±9. 0±0. 8) MeV/c^2 and Γ= (110. 5±15. 0±2. 9) MeV, respectively, which is consistent with the parameters of the well-established resonance ψ (4415). In addition, we also use one single resonance to describe the e^+e^-→ωχ₂₁ line shape and determine the mass and width to be M= (4544. 2±18. 7±1. 7) MeV/c^2 and Γ= (116. 1±33. 5±1. 7) MeV, respectively. The structure of this line shape, observed for the first time, requires further understanding.
Mori et al. (Fri,) studied this question.
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