# Hidden charmonium decays of $Z c$ in intermediate meson loops model

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The BESIII collaboration reported an observation of a charged charmonium-like structure $Z c(3900)$ in the invariant mass spectrum of $J-\psi \pi^{\pm}$ in $e^+ e^- \to J-\psi \pi^+\pi^-$ at the center of mass 4.260 MeV, which could be an analogue of $Z b(10610)$ claimed by the Belle Collaboration. In this work, we investigate the hidden charmonium transitions of $Z c$ via intermediate $D \ {D}^*$ meson loops. Our results show that the intermediate $D \ {D}^*$ meson loops are crucial for driving the transitions of $Z c$. We also make a predication for the hidden charmonium decays of $Z c$s partner ($Z c^\prime$).

Autor: Gang Li

Fuente: https://archive.org/