The study of $\gamma \gamma \to \gamma \psi (2S)$ at Belle

X. L. Wang, B. S. Gao, W. J. Zhu +200

Using $980\mathrm{f}{\mathrm{b}}^{-1}$ of data on and around the ${\rm Y}(nS)(n=1,2,3,4,5)$ resonances collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, the two-photon…