XVIII International Conference on Hadron Spectroscopy and Structure (HADRON2019)

We report a new measurement of the $e^+e^-\to \Upsilon(nS)\pi^+\pi^-$ ($n=1,2,3$) cross sections at energies from 10.52 to 11.02 GeV, where we observe a new structure in the energy dependence of the cross sections and find evidence for the $\Upsilon(1S)\pi^+\pi^-$ production below the $B\bar{B}$ threshold. Along with this we also present observation of $e^+e^- \to \gamma \chi_{c1}$ and search for $e^+e^- \to \gamma \chi_{c0}$, $\gamma \chi_{c2}$ and $\gamma \eta_c$ at Belle. The results are based on the data sample collected by the Belle detector at the asymmetric energy $e^+e^-$ collider KEKB.