Initial State Radiation and Two-photon results from Belle

Abstract

We review recent results from initial state radiation and two-photon processes at the Belle experiment. The results include the measurements of $e^+e^- \to \pi^+ \pi^- J/\psi$, $\pi^+ \pi^- \psi(2S)$, $K^+ K^- J/\psi$, and $\gamma \chi_{cJ}$ from initial state radiation processes and the measurementof $\gamma \gamma \to p \bar{p} K^+ K^-$ from two-photon process. We also summarize all the published results from these two kinds of processes. Moreover, we point out some golden channels that will be studied firstly with larger statistic at Belle II in the near future.