Quark Wigner distributions and spin-spin correlations

Abstract

We investigate the Wigner distributions for $u$ and $d$ quarks in a light-front quark-diquark model of a proton to unravel the spatial and spin structure. The light-front wave functions are modeled from the soft-wall AdS/QCD prediction. We consider the contributions from both the scalar and the axial vector diquarks. The Wigner distributions for unpolarized, longitudinally polarized, and transversely polarized protons are presented in the transverse momentum plane as well as in the transverse impact parameter plane. The Wigner distributions satisfy a Soffer-bound-type inequality. We also evaluate all the leading twist GTMDs and show their scale evolution. The spin-spin correlations between the quark and the proton are investigated

35 pages, 16 figures. arXiv admin note: text overlap with arXiv:1601.03217

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• Scalar spectrum in a graviton soft wall model
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• Gluon Generalized TMDs and Wigner Distributions in boost invariant longitudinal space
• Understanding the Valence Quark Structure of the Pion through GTMDs
• Gluon generalized transverse momentum dependent parton distributions and Wigner functions of the Proton
• TMD Relations: Insights from a Light-Front Quark-Diquark Model
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• Study of Twist-2 GTMDs in scalar-diquark model
• T-odd Wigner Distributions in boost-invariant longitudinal position space and Spin-momentum correlation in proton