We present a new formalism which systematically accounts for nucleon compositeness in nuclear scattering amplitudes, consistent-with quantum chromodynamics (QCD) and covariance. Reduced gauge-invariant nuclear amplitudes are defined which have elementary QCD scaling properties. The procedure is applied to the photodisintegration and electrodisintegration of the deuteron as a test of nuclear chr...

Leading nonperturbative corrections to the quark and gluon propagators are derived following the assumption that the nonperturbative QCD vacuum can be described in terms of non-vanishing vacuum expectation values for the composite operators [T&I and [GEY]. Th e nonperturbative quark propagator can be described in terms of a running quark mass and a running normalization function. These quantiti...