Complete Next-to-Next-to-Leading-Order QCD Correction to $J/\ddot{I}ˆ\to 3{\hat{I}}^3$ Decay

Chao Zeng, Bin Gong, Jian-Xiong Wang +3

We address the long-standing problem of negative decay and production rates in perturbative QCD for exclusive processes by proposing amplitude-level NRQCD factorization as a system…