An analysis of 4-quark energies in SU(2) lattice Monte Carlo
  Energies of four-quark systems with the tetrahedral geometry measured by the static quenched SU(2) lattice Monte Carlo method are analyzed by parametrizing the gluon overlap factor in the form exp(-[bs EA+{\sqrt bs}FP]) where A and P are the area and the perimeter defined mainly by the positions of the four quarks, bs is the string constant in the 2-quark potentials and E, F are constants. 
Sadataka Furui (Teikyo U.), Bilal Masud (Punjab U.)