Quark Wigner distributions and orbital angular momentum in light-front dressed quark model

Abstract

We calculate the Wigner functions for a quark target dressed with a gluon at one loop in perturbation theory. The Wigner distributions give the combined position and momentum space information of the quark distributions and are related to both generalized parton distributions and transverse momentum dependent parton distributions. We calculate and compare the different definitions of quark orbital angular momentum and the spin-orbit correlations in this perturbative model. We compare our results with other model calculations.