Low-energy D~(*+)_1~0 scattering and the nature of resonance-like structure Z~+(4430)

Low-energy scattering of D *+ and  0 1 meson is studied using quenched lattice QCD with improved lattice actions on anisotropic lattices.The threshold scattering parameters,namely the scattering length a 0 and the effective range r 0,for the s-wave scattering in J P = 0 - channel are extracted: a 0...