Zc+(3900) decay width in QCD sum rules

We identify the recently observed charmonium like structure Z(c)(+/-)(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(+), Z(c)(+) eta(c)rho(+) and Z(c)(+)D(+)(D) over bar*(0) 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.