Observation of e+e− → π0π0ψ2(3823)
Observation of e+e− → π0π0ψ2(3823)
A bstract Using a data sample corresponding to an integrated luminosity of 11.3 fb − 1 collected at center-of-mass energies from 4.23 to 4.70 GeV with the BESIII detector, we observe the process e + e − → π 0 π 0 ψ 2 (3823) for the first time with …