期刊
FEW-BODY SYSTEMS
卷 55, 期 5-7, 页码 287-296出版社
SPRINGER WIEN
DOI: 10.1007/s00601-013-0795-x
关键词
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资金
- European Community [283286]
- P2I (Physique des deux Infinis) network
- Belgian Fund F.R.S.-FNRS via Charge de recherches
We discuss the quark Wigner distributions which represent the quantum-mechanical analogues of the classical phase-space distributions. These functions can be obtained through a Fourier transform in the transverse space of the generalized transverse momentum dependent parton distributions, which encode the most general one-body information of partons in momentum space. In particular, we present a study within light-front quark models. The quark orbital angular momentum is also obtained from the phase-space average of the orbital angular momentum operator weighted with the Wigner distribution of unpolarized quark in a longitudinally polarized nucleon. The corresponding results calculated within different light-front quark models are compared with alternative definitions of the quark orbital angular momentum as given in terms of generalized parton distributions and transverse momentum dependent parton distributions.
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