MENU 2016

Zc(3900) from Lattice QCD simulation

27 Jul 2016, 10:35

40m

1F Centennial Hall (Clock Tower Centennial Hall, Kyoto University)

Board: P-3-3

Plenary

Speaker

Yoichi Ikeda (RCNP, Osaka University)

Description

The possible exotic meson $Z_c(3900)$, found in $e^{+}{e}^{-}$ reactions, is studied by the method of coupled-channel scattering in lattice QCD. The interactions among $\pi J/\psi$, $\rho {\eta }_c$ and $\overline{D}{D}^{\ast }$ channels are derived from (2+1)-flavor QCD simulations at $m_{\pi }=410$-$700$ MeV. The interactions are dominated by the off-diagonal $\pi J/\psi$-$\overline{D}{D}^{\ast }$ and $\rho {\eta }_c$-$\overline{D}{D}^{\ast }$ couplings, which indicates that the $Z_c(3900)$ is not a usual resonance but a threshold cusp. Semi-phenomenological analyses with the coupled-channel interaction are also presented to confirm this conclusion.

Presentation materials

Slides

Ikeda_MENU2016.web.pdf