Search for Zc+ (3900) in the 1+- channel on the lattice

Recently three experiments reported a discovery of manifestly exotic Z(c)(+)(3900) in the decay to J/psi pi(+), while J and P are experimentally unknown. We search for this state on the lattice by simulating the channel with J(PC) = 1(+-) and I = 1, and we do not find a candidate for Z(c)(+)(3900). Instead, we only find discrete scattering states D (D) over bar* and J/psi pi, which inevitably have to be present in a dynamical QCD. The possible reasons for not finding Z(c)(+) may be that its quantum numbers are not 1(+-) or that the employed interpolating fields are not diverse enough. Simulations with additional types of interpolators will be needed to reach a more definite conclusion. (C) 2013 Elsevier B.V. All rights reserved.