Mathematical, Computing & Information Sciences
A straightforward calculation reveals the essentially nonlocal character of the leading heavy Q¯Q interaction arising from nonperturbative gluon field correlations in the model of a fluctuating QCD vacuum. In light of this quarkonium spin splitting ratio predictions which have supported the scalar confinement ansatz are reconsidered as a specific example of possible conse- quences for spectroscopy.
Williams, Ken, "Nonperturbative QCD Vacuum Effects in Nonlocal Quark Dynamics" (1997). Research, Publications & Creative Work. 81.