Are Instantons Found?

Abstract

It is argued that the recent prediction of the $a$ dependence of the coupling, $g\left(a\right)\mathrm{}$, of an effective lattice gauge theory for quarkless quantum chromodynamics is confirmed by a recent numerical evaluation of $g\left(a\right)\mathrm{}$ for a latticized SU(2) gauge theory, thus providing strong evidence for the dynamical role of instantons. Additional predictions, testing the validity of the quantum chromodynamics bag model, are presented.