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

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

2010-01-29

arxiv.org/abs/1001.5398v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

references and explanations added; version to appear in Phys. Rev. D

Scientific paper

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. The favourable comparison with existing phenomenological parametrizations motivates further applications to describe azimuthal asymmetries in hadronic reactions.

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