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

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arxiv 1712.02110 v1 pith:FP7W2ANI submitted 2017-12-06 hep-ph

Narinder Kumar , Chandan Mondal , Neetika Sharma This is my paper · ORCID
classification hep-ph
keywords light-frontmodelmomentumangulardensitiesquark-diquarkdistributiondown
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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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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 27 citations worldwide. Full citation record

  1. Gluon contribution to the angular momentum distribution of a dressed quark state

    hep-ph 2024-11 accept novelty 6.0 of 10

    Gluon angular momentum densities in a dressed quark model are computed for canonical, kinetic, and Belinfante decompositions, and the spin sum rule is verified.

  2. Origin of the nucleon gravitational form factor $B_N(t)$: Exposition in light-front holographic QCD

    hep-ph 2026-01 unverdicted novelty 5.0 of 10

    In light-front holographic QCD the nucleon gravitational form factor B_N(t) vanishes exactly in the symmetric limit due to an antisymmetric longitudinal factor and remains strongly suppressed for realistic nucleon wav...

  3. T-odd Wigner Distributions in boost-invariant longitudinal position space and Spin-momentum correlation in proton

    hep-ph 2024-08 unverdicted novelty 5.0 of 10

    T-odd leading-twist GTMDs in σ-space exhibit -t-dependent oscillations with transverse-longitudinal interference, while Sivers and Boer-Mulders Wigner distributions encode proton spin-transverse momentum correlations.

  4. Mechanical properties of the proton from a deformed AdS holographic model

    hep-ph 2025-11 conditional novelty 4.0 of 10

    A deformed AdS holographic model with a Dirac proton computes the gluon gravitational form factor A in good agreement with lattice QCD after normalizing the zero point, but the D-term and derived pressure/shear distri...

  5. Generalized parton distributions of a deuteron in an AdS/QCD hard-wall model

    hep-ph 2026-06 unverdicted novelty 3.0 of 10

    Deuteron GFFs and GPDs calculated in hard-wall AdS/QCD agree in momentum dependence with soft-wall results and match experimental gravitational mean square radius.

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