POTENTIALS BETWEEN HEAVY-LIGHT MESONS FROM LATTICE AND INVERSE SCATTERING-THEORY

We extend our investigation of heavy-light meson-meson interactions to a system consisting of a heavy-light meson and the corresponding anti particle. An effective potential is obtained from meson-antimeson Gree n-functions computed in a quenched simulation with staggered fermions. Comparisons with a simulation using an O(a(2)) tree-level and tadpole improved gauge action and a full QCD simulation show that lattice dis cretization errors and dynamical quarks have no drastic influence. cal culations from inverse scattering theory propose a similar shape for K (K) over bar potentials.