Sivers and Boer-Mulders functions in Light-Cone Quark Models

Understand

Results for the naive-time-reversal-odd quark distributions in a light-cone quark model are presented.

• The final-state interaction effects are generated via single-gluon exchange mechanism.
• The formalism of light-cone wave functions is used to derive general expressions in terms of overlap of wave-function amplitudes describing the different orbital angular momentum components of the nucleon.
• In particular, the model predictions show a dominant contribution from S- and P-wave interference in the Sivers function and a significant contribution also from the interference of P and D waves in the Boer-Mulders function.