Next-to-next-to-leading-order QCD corrections to double $J/\psi$ production at the $B$ factories

Xu-Dong Huang, Bin Gong, Rui-Chang Niu +2

In this paper, we study the next-to-next-to-leading-order (NNLO) QCD corrections for the process $e^{+}{e}^{-}\to J/\psi +J/\psi$ at the $B$ factories. By including the NNLO corrections, the c…