A coupled-channel analysis of the $X(3872)$ lineshape with BESIII data
BESIII Collaboration, М. Н. Ачасов, P. Adlarson, X. Ai et autres
We perform a study of the $X(3872)$ lineshape using the data samples of $e^+e^-\toγX(3872)$, $X(3872)\to D^0\bar{D}^0 π^0$ and $π^+π^- J/ψ$ collected with the BESIII detector. The effects of the coupled-channels and the off-shell $D^{*0}$ are included in the parameterization of the lineshape. …