  A recent Schwinger Generating Functional based formulation, by
H.M.Fried,Y.Gabellini,T.Grandou and Y-M.Sheu and P.H.Tsang provided
gauge-invariant, exact, non-perturbative solutions for QCD. After choosing a
renormalization scheme and assuming a simpler 2 body quark-quark scattering
problem, this formalism is tested against experimental elastic proton-proton
scattering at LHC energies (7, 8, 13 TeV). This formulation was previously
compared with ISR energies at (23.5 - 62.5 GeV). The full scattering amplitude
with infinite gluons summed, infinite loops summed and their interference terms
are needed for LHC differential cross-sections.
