Data di Pubblicazione:
2010
Abstract:
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.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
transcerse momentum dependent parton distributions; light-cone wave functions; quark models
Elenco autori:
Pasquini, Barbara; F., Yuan
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