  The potential between two heavy-light mesons as a function of the heavy quark
separation is calculated in quenched SU(3) lattice QCD. We study the case of
heavy-light mesons with a static heavy quark and light quarks of mass close to
the strange quark mass. We explore the case of light quarks with the same and
with different flavours, classified according to the light quark isospin. We
evaluate the appropriate light quark exchange contributions and explore the
spin-dependence of the interaction. Comparison is made with meson exchange.

High Energy Physics - Lattice;High Energy Physics - Phenomenology