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Gluon gravitational form factors of the proton in a light-front spectator model

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arxiv 2503.12574 v1 pith:ZXSGA2DI submitted 2025-03-16 hep-ph hep-lathep-thnucl-th

Gluon gravitational form factors of the proton in a light-front spectator model

classification hep-ph hep-lathep-thnucl-th
keywords gluonprotongffsmodelpressurecontributiondistributionfactors
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We calculate the gluon gravitational form factors (GFFs) of the proton using a light-front spectator model based on soft-wall AdS/QCD, where the active parton is a gluon. The model parameters are determined by fitting the unpolarized gluon distribution function to the NNPDF3.0nlo dataset. Subsequently, we predict the polarized gluon distribution, finding consistency with global analyses. Our predictions for the gluon GFFs show good agreement with recent lattice QCD simulations and experimental extractions. Using these gluon GFFs, we compute the contribution of the gluon to the proton mass and mechanical radii. We also analyze the gluonic contribution to the two-dimensional Galilean densities, including energy density, radial and tangential pressure, isotropic pressure, and pressure anisotropy of the proton.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    nucl-th 2026-05 unverdicted novelty 7.0

    D-term of nuclei exhibits kinks at magic neutron numbers, showing strong sensitivity of mechanical properties to shell structure.

  2. Transverse energy-momentum tensor distributions in polarized nucleons

    hep-ph 2026-04 unverdicted novelty 6.0

    The quantum phase-space formalism derives transverse energy-momentum tensor distributions in polarized nucleons and reproduces standard light-front distributions including bad components in the infinite-momentum frame.

  3. Gravitational transverse momentum distribution of proton

    hep-ph 2026-04 unverdicted novelty 6.0

    Analytical expressions for quark gravitational TMDs are derived in the LFQDM, verified against standard TMD relations, and linked to transverse pressure and shear-force distributions.

  4. Gravitational form factors of light mesons from Basis Light-Front Quantization

    hep-ph 2026-05 unverdicted novelty 5.0

    Gravitational form factors of pion and kaon are computed in BLFQ; A(Q^2) agrees with lattice QCD while D(Q^2) is enhanced at low Q^2 due to small-x and zero-mode sensitivity in the truncated model.

  5. QCD Wehrl and entanglement entropies in a gluon spectator model at small-$x$

    hep-ph 2025-12 unverdicted novelty 5.0

    In a gluon spectator model at small x, the normalized Husimi distribution yields a Wehrl entropy that decomposes into an entanglement entropy term matching CMS data and a transverse residual term.

  6. Transverse energy-momentum tensor distributions in polarized nucleons

    hep-ph 2026-04 accept novelty 4.5

    Transverse EMT distributions in polarized nucleons are derived in the quantum phase-space formalism; they reduce to standard light-front densities (including bad components) in the infinite-momentum frame.

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

    hep-ph 2025-11 conditional novelty 4.0

    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...