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Proton structure from a light-front Hamiltonian

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arxiv 1911.10913 v1 pith:24ZXRUUT submitted 2019-11-25 hep-ph nucl-th

classification hep-phnucl-th
keywords axialexperimentalformchargedataelectromagneticfactorshamiltonian
verification ladder T0 review T1 audit T2 compute T3 formal
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We obtain the electromagnetic form factors, the axial form factor, and the parton distribution functions of the proton from the eigenstates of a light-front effective Hamiltonian in the leading Fock representation suitable for low-momentum scale applications. The electromagnetic and the axial form factors are found to be in agreement with the available experimental data. The unpolarized, the helicity, and the transversity valence quark distributions, after QCD evolution, are consistent with the global QCD analyses. The tensor charge also agree the experimental data, while the axial charge is somewhat outside the experimental error bar.

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Cited by 5 Pith papers

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

  1. Proton Gravitational Structure and Mass Decomposition on the Light Front

    hep-ph 2025-06 conditional novelty 6.0 of 10

    Using a light-front Hamiltonian with three-quark and three-quark-plus-gluon Fock sectors, the authors extract quark and gluon gravitational form factors and find a proton mass decomposition of 31.5% quark energy, 34.7...

  2. Quark and gluon entanglement in the proton based on a light-front Hamiltonian

    hep-ph 2024-12 reject novelty 6.0 of 10

    Using BLFQ proton wave functions, the authors compute parton spin and momentum entanglement and report that a dynamical gluon enhances quark entanglement.

  3. Exclusive $J/\psi$ photoproduction in photon-proton diffractive scattering: A light-front Hamiltonian approach

    hep-ph 2026-07 conditional novelty 5.0 of 10

    BLFQ proton and J/ψ light-front wave functions yield a slightly lower exclusive J/ψ photoproduction cross section than prior models, with matching exponential slope B≈3 GeV^{-2}, usable as BK initial conditions.

  4. Implications of exclusive photon leptoproduction measurements for the proton charge-radius puzzle

    hep-ph 2026-07 conditional novelty 5.0 of 10

    After excluding or cutting low-|t| CLAS 2018 data, BH-dominated EP measurements yield a proton charge radius smaller than the PDG average and consistent with PRad and muonic hydrogen.

  5. Gluon skewed generalized parton distributions of proton from a light-front Hamiltonian approach

    hep-ph 2025-01 conditional novelty 5.0 of 10

    Using light-front wave functions with one dynamical gluon, the authors obtain all leading-twist gluon GPDs of the proton at nonzero skewness and find diffraction-like patterns in longitudinal position space.

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