# $$Z_c(3900)/Z_c(3885)$$ as a virtual state from $$\pi J/\psi -\bar{D}^*D$$πJ/ψ-D¯∗D interaction

The European Physical Journal C, Feb 2018

In this work, we study the $${\pi \!}J{\!/}\psi$$ and $$\bar{D}^*D$$ invariant mass spectra of the Y(4260) decay to find out the origin of the $$Z_c(3900)$$ and $$Z_c(3885)$$ structures. The $${\pi \!}J{\!/}\psi -\bar{D}^{*}D$$ interaction is studied in a coupled-channel quasipotential Bethe–Saltpeter equation approach, and embedded to the Y(4260) decay process to reproduce both $${\pi ^{-}\!}J{\!/}\psi$$ and $$D^{*-}D^0$$ invariant mass spectra observed at BESIII simultaneously. It is found out that a virtual state at energy about 3870 MeV is produced from the interaction when both invariant mass spectra are comparable with the experiment. The results support that both $$Z_c(3900)$$ and $$Z_c(3885)$$ have the same origin, that is, a virtual state from $${\pi \!}J{\!/}\psi -\bar{D}^*{D}$$ interaction, in which the $$\bar{D}^*{D}$$ interaction is more important and the coupling between $$\bar{D}^*{D}$$ and $${\pi \!}J{\!/}\psi$$ channels plays a minor role.

This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-5580-z.pdf

Jun He, Dian-Yong Chen. $$Z_c(3900)/Z_c(3885)$$ as a virtual state from $$\pi J/\psi -\bar{D}^*D$$πJ/ψ-D¯∗D interaction, The European Physical Journal C, 2018, 94, DOI: 10.1140/epjc/s10052-018-5580-z