Next-to-leading order analysis of $J/\ddot{I}ˆ+{\hat{I}}^3$ production in photon-photon collisions at CEPC

Ying-Zhao Jiang, Zhan Sun

We systematically investigate the production of $J/\ddot{I}ˆ+{\hat{I}}^3$ in ${\hat{I}}^3{\hat{I}}^3$ collisions within nonrelativistic QCD (NRQCD) factorization, with the direct-photon channel calculated specific…