Nucleon axial form factor from generalized parton distributions

Hadi, Hashamipour,; Goharipour, Muhammad; Gousheh, S. S.

doi:10.1103/physrevd.100.016001

Cited by 14 publications

(36 citation statements)

References 95 publications

(213 reference statements)

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“…A − G d A as a function of Q 2 , where we compare our BLFQ results with the experimental data [106,107] and with lattice results [108]. Considering the theoretical and experimental uncertainties, the agreement is good.…”

Section: Form Factors and Pdfs Of The Protonmentioning

confidence: 68%

See 1 more Smart Citation

Proton structure from a light-front Hamiltonian

Mondal

Lan

et al. 2020

Phys. Rev. D

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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 agrees the experimental data, while the axial charge is somewhat outside the experimental error bar.

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Section: Form Factors and Pdfs Of The Protonmentioning

confidence: 68%

“…The extracted data are taken from the Refs. [106,107] and the lattice data from [108]. The dashed line represents the dipole fit of the experimental data [106].…”

Section: Form Factors and Pdfs Of The Protonmentioning

confidence: 99%

Proton structure from a light-front Hamiltonian

Mondal

Lan

et al. 2020

Phys. Rev. D

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show abstract

“…We refer to the articles [51,52] for a review of experimental data on the nucleon axial FFs. The axial FFs can be extracted using various theoretical approaches [53][54][55][56][57][58][59][60][61]. In recent years, lattice QCD simulations of axial FFs have been reported for pion masses in the range 0.2 − 0.6 GeV [62][63][64][65][66][67][68][69], while in a very recent study, the lattice QCD calculation of nucleon axial FF in 2 + 1 flavor near the physical pion mass has been presented by the PACS Collaboration [70].…”

Section: Introductionmentioning

confidence: 99%

Nucleon structure from basis light-front quantization

Xu,

Mondal,

Lan

et al. 2021

Preprint

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We produce the light-front wave functions (LFWFs) of the nucleon from a basis light-front approach in the leading Fock sector representation. We solve for the mass eigenstates from a light-front effective Hamiltonian, which includes a confining potential adopted from light-front holography in the transverse direction, a longitudinal confinement, and a one-gluon exchange interaction with fixed coupling. We then employ the LFWFs to obtain the electromagnetic and axial form factors, the parton distribution functions (PDFs) and the generalized parton distribution functions for the nucleon. The electromagnetic and axial form factors of the proton agree with the experimental data, whereas the neutron form factors deviate somewhat from the experiments in the low momentum transfer region. The unpolarized, the helicity, and the transversity valence quark PDFs, after QCD scale evolution, are fairly consistent with the global fits to the data at the relevant experimental scales. The helicity asymmetry for the down quark also agrees well with the measurements, however, the asymmetry for the up quark shows a deviation from the data, especially in the small x region. We also find that the tensor charge agrees well with the extracted data and the lattice QCD predictions, while the axial charge is somewhat outside the experimental error bar. The electromagnetic radii of the proton, the magnetic radius of the neutron, and the axial radius are in excellent agreement with the measurements, while the neutron charge radius deviates from experiment.

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“…The 3D hadron structure can be accessed through GPDs [1][2][3][4][5] which are measurable in hard exclusive scattering processes. In this work, following the recent works [25,26] performed to determine the polarized GPDs H q v , we determined the unpolarized valence GPDs H q v and E q v with their uncertainties at zero skewness (ξ = 0) by performing some χ 2 analyses of the related experimental data. To this end, we first considered the world electron scattering data presented in Ref.…”

Section: Discussionmentioning

confidence: 99%

“…This property gives possibility to use the reduced GPDs H q , H q and E q at ξ = 0 to extract them from FFs analyses [23,24]. Following this procedure the analyses of the polarized GPDs H q was done in [25,26].…”

Section: Introductionmentioning

confidence: 99%

Determination of the generalized parton distributions through the analysis of the world electron scattering data considering two-photon exchange corrections

Hashamipour,

Goharipour,

Azizi

et al. 2021

Preprint

Self Cite

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We determine the valence generalized parton distributions (GPDs) H q v and E q v with their uncertainties at zero skewness by performing a χ 2 analysis of the world electron scattering data considering two-photon exchange corrections. The data include a wide and updated range of the electric and magnetic form factors (FFs) of the proton and neutron. As a result, we find that there are no enough constraints on GPDs E q v from FFs data solely though H q v are well constrained. By including the new data of the charge and magnetic radius of the nucleon in the analysis, we show that they put new constraints on the final GPDs, especially on E q v . Moreover, we calculate the gravitational FF M2 and the total angular momentum J q using the extracted GPDs and compare them with the FFs obtained from the light-cone QCD sum rules (LCSR) and Lattice QCD. We show that our results are interestingly in a good consistency with the pure theoretical predictions.

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Nucleon axial form factor from generalized parton distributions

Cited by 14 publications

References 95 publications

Proton structure from a light-front Hamiltonian

Proton structure from a light-front Hamiltonian

Nucleon structure from basis light-front quantization

Determination of the generalized parton distributions through the analysis of the world electron scattering data considering two-photon exchange corrections

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