The Zc(3900) peak does not come from the triangle singularity

We compare contributions from the triangle diagram and the D (D) over bar* bubble chain with the processes of e(+)e(-) -> J/psi pi(+)pi(-) and e(+)e(-) -> D (D) over bar*(-/+)pi(+/-). By fitting the J/psi pi maximum spectrum and the D (D) over bar* spectrum, we find that the triangle diagram cannot explain the new experimental results from BESIII Collaboration at center of mass at 4.23 and 4.26 GeV, simultaneously. On the contrary, the molecular assignment of Z(c)(3900) gives a much better description.