Comprehensive Calculations on the OZI-forbidden Nonleptonic Decays of Orthoquarkonia $J/\psi ({\rm Y})\to \pi \pi ,\rho \pi$

Tong Li, Shu-Min Zhao, Xue-Qian Li

In this work, we calculate the decay rates of the OZI-forbidden processes $J/\psi ({\rm Y})\to \pi \pi ,\rho \pi$ at the order of the leading-twist distribution amplitude. The process of $J/ψ(Υ)\to π^+…