1304.4458 (Gang Li)

Hidden charmonium decays of $Z_c$ in intermediate meson loops model    [PDF]

Gang Li

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 ($Z_c^\prime$).

View original: http://arxiv.org/abs/1304.4458