An anlaysis on $J/\psi \to {\pi }^0{\gamma }^{\ast }$ within resonance chiral theory

Yi-Hao Zhang, Shao-Zhou Jiang, Ling-Yun Dai

In this study, we analyze the first measurement of the electron-positron invariant mass spectrum in $J/\psi \to {\pi }^0{e}^{+}{e}^{-}$ by BESIII, using the framework of resonance chiral theory. O…