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Gravitational form factors and angular momentum densities in light-front quark-diquark model

Regular Article - Theoretical Physics

Abstract.

We investigate the gravitational form factors (GFFs) and the longitudinal momentum densities ( \( p^+\) densities) for proton in a light-front quark-diquark model. The light-front wave functions are constructed from the soft-wall AdS/QCD prediction. The contributions from both the scalar and the axial vector diquarks are considered here. The results are compared with the consequences of a parametrization of nucleon generalized parton distributions (GPDs) in the light of recent MRST measurements of parton distribution functions (PDFs) and a soft-wall AdS/QCD model. The spatial distribution of angular momentum for up and down quarks inside the nucleon has been presented. At the density level, we illustrate different definitions of angular momentum explicitly for an up and down quark in the light-front quark-diquark model inspired by AdS/QCD.

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Copyright information

© SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • Narinder Kumar
    • 1
  • Chandan Mondal
    • 2
  • Neetika Sharma
    • 3
    • 4
  1. 1.Department of PhysicsIndian Institute of Technology KanpurKanpurIndia
  2. 2.Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
  3. 3.Department of Physical SciencesI K Gujral Punjab Technical UniversityJalandharIndia
  4. 4.Department of PhysicsPanjab UniversityChandigarhIndia

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