Heavy-quark bound states in lattice QCD

We present a new technique for analyzing heavy-quark bound states in lattice QCD. The method is based upon a nonrelativistic reformulation of the heavy-quark dynamics that is systematically developed starting from the Dirac theory. It is far superior to traditional relativistic techniques, as we illustrate in a numerical study of the $\ensuremath{\Upsilon}$ and $\ensuremath{\psi}$ meson families.

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