Nonperturbative determination of the QCD potential at O(1/m)
  The relativistic correction to the QCD static inter-quark potential at O(1/m) is investigated nonperturbatively for the first time by using lattice Monte Carlo QCD simulations. The correction is found to be comparable with the Coulombic term of the static potential when applied to charmonium, and amounts to one-fourth of the Coulombic term for bottomonium. 
Yoshiaki Koma, Miho Koma, Hartmut Wittig