Nature of X(3872) from recent BESIII data: Considering the universal feature of an S-wave threshold resonance

Abstract

We analyze the recent data from the BESIII collaboration on the $X(3872)$ state in the $J/\psi {\pi }^{+}{\pi }^{-}$ and $D^0{\bar{D}}^0{\pi }^0$ decay channels. The quantum number and mass of the $X(3872)$ state allow us to exploit the universal feature of the very near-threshold $D{\bar{D}}^{\ast }$ scattering in the $S$ wave. The analysis of $J/\psi {\pi }^{+}{\pi }^{-}$ data and $D^0{\bar{D}}^0{\pi }^0$ data separately as well as the combined analysis of these data together, all support the conclusion that $X(3872)$ is an extremely weakly bound charm meson molecule.

Comments: pdflatex, 15 pages, 3 figures, 3 tables; to be published in Chinese Physics C