Quark Wigner Distributions

Details Quark Wigner Distributions Quark Wigner Distributions

2011-07-20

arxiv.org/abs/1107.3984v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure; prepared for the workshop "XIX International Workshop on Deep-Inelastic Scattering and Related Subjects (DI

Scientific paper

We study the Wigner functions of the nucleon which provide multidimensional images of the quark distributions in phase space and combine in a single picture all the information contained in the generalized parton distributions (GPDs) and the transverse-momentum dependent parton distributions (TMDs). In particular, we present results for the distribution of unpolarized quark in a longitudinally polarized nucleon. Treating this distribution as it was a classical distribution, we also obtain the expectation value of the orbital angular momentum operator and compare the corresponding results from different quark models with the values obtained using alternative definitions of the orbital angular momentum, as given in terms of the GPDs and the TMDs.

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