%0 Journal Article
%T $Z_c^+(3900)$ decay width in QCD sum rules
%A Dias
%A J. M.
%A Navarra
%A F. S.
%A Nielsen
%A M.
%A Zanetti
%A C. M.
%J High Energy Physics - Phenomenology
%D 2013
%I 
%X We identify the recently observed charmonium-like structure $Z_c^\pm(3900)$ as the charged partner of the X(3872) state. Using standard techniques of QCD sum rules, we evaluate the three-point function and extract the coupling constants of the $Z_c \, J/\psi \, \pi^+$ and $Z_c \, \eta_c \, \rho^+$ vertices and the corresponding decay widths in these channels. The good agreement with the experimental data gives support to the tetraquark picture of this state.
%U http://arxiv.org/abs/1304.6433