We show how the operator product expansion evaluated in the approximation of ignoring gluons leads to the covariant formulation of the quark parton model. We discuss the connection with other formulations and show how the free quark model prediction, g2 = 0, changes smoothly into the Wandzura-Wilczek (WW) relation for quark masses small relative to the nucleon mass. Previous contradictory parto...

We present distributions in longitudinal and transverse momentum for hadrons produced in various deep inelastic processes for a particular picture of quark dressing. The sensitivity of various parameters in the model to presently available data is explored. Predictions are also made for the correlations expected in proton-proton scattering events which yield a high transverse momentum pion or k...