Wigner Functions and Nucleon Structure
Résumé
We discuss the leading-twist quark Wigner distributions in the nucleon, both in the T-even and T-odd sectors, considering all the possible configurations of the quark and nucleon polarizations. We identify the basic multipole structures associated with each distribution in the transverse phase space, providing a transparent interpretation of the spin-spin and spin-orbit correlations of quarks and nucleons encoded in these functions.