Semileptonic and nonleptonic weak decays of $\psi (1S,2S)$ and ${\eta }_c(1S,2S)$ to $D_{(s)}$ in the covariant light-front approach

Zhi-Jie Sun, Zhi-Qing Zhang, You-Ya Yang +1

In addition to the strong and electromagnetic decay modes, the $\psi (1S,2S)$ and ${\eta }_c(1S,2S)$ can also decay via the weak interaction. Such weak decays can be detected by the high-l…