Form factors and transverse charge and magnetization densities in the hard-wall AdS/QCD model

Mondal, Chandan

doi:10.1103/physrevd.94.073001

Cited by 12 publications

(3 citation statements)

References 102 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nucleon electromagnetic FFs have been theoretically investigated in Refs. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], while their flavor decomposition has been reported in Refs. [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Proton structure from a light-front Hamiltonian

Mondal

Lan

et al. 2020

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Proton structure from a light-front Hamiltonian

Mondal

Lan

et al. 2020

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

show abstract

“…Other attempts to describe the flavor nucleon FFs in AdS/QCD also require a large number of parameters [59]. On the other hand, simple holographic models, which essentially include only the valence contribution, fail to systematically account for all the properties of the nucleon FFs and their flavor decomposition [34,60,61]. As we show below, higher-twist components in the Fock expansion are in general needed for an accurate description of the nucleon FFs, and, in fact, this can be achieved with a minimal number of parameters in the LF holographic framework.…”

Section: Introductionmentioning

confidence: 99%

Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region

et al. 2017

View full text Add to dashboard Cite

We present a comprehensive analysis of the spacelike nucleon electromagnetic form factors and their flavor decomposition within the framework of light-front holographic QCD. We show that the inclusion of the higher Fock components |qqqqq has a significant effect on the spin-flip elastic Pauli form factor and almost zero effect on the spin-conserving Dirac form factor. We present light-front holographic QCD results for the proton and neutron form factors at any momentum transfer range, including asymptotic predictions, and show that our results agree with the available experimental data with high accuracy. In order to correctly describe the Pauli form factor we need an admixture of a five quark state of about 30% in the proton and about 40% in the neutron. We also extract the nucleon charge and magnetic radii and perform a flavor decomposition of the nucleon electromagnetic form factors. The free parameters needed to describe the experimental nucleon form factors are very few: two parameters for the probabilities of higher Fock states for the spin-flip form factor and a phenomenological parameter r, required to account for possible SU(6) spin-flavor symmetry breaking effects in the neutron, whereas the Pauli form factors are normalized to the experimental values of the anomalous magnetic moments. The covariant spin structure for the Dirac and Pauli nucleon form factors prescribed by AdS 5 semiclassical gravity incorporates the correct twist scaling behavior from hard scattering and also leads to vector dominance at low energy.

show abstract

“…There are numerous dedicated experimental and theoretical efforts for studying the nucleon FFs [19][20][21][22][23]. The transverse charge and magnetization densities are defined through the twodimensional Fourier transformation of the Dirac and Pauli FFs [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Nucleon structure from a light-front hamiltonian

Mondal²,

Li³

et al. 2022

Supl. Rev. Mex. Fis.

Self Cite

View full text Add to dashboard Cite

We obtain the light-front wave functions (LFWFs) of the nucleon in the leading Fock sector representation using basis light-front quantization (BLFQ) approach. We adopt a light-front effective Hamiltonian, which includes a three-dimensional confining potential and a one-gluon exchange interaction with fixed coupling, and solve for it mass eigenstates. We then employ the LFWFs to compute the axial form factor and the transverse charge and magnetization densities for the nucleon. The axial form factor is found to be consistent with the experimental data. The charge and magnetization densities agree qualitatively with the phenomenological fits.

show abstract

Form factors and transverse charge and magnetization densities in the hard-wall AdS/QCD model

Cited by 12 publications

References 102 publications

Proton structure from a light-front Hamiltonian

Proton structure from a light-front Hamiltonian

Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region

Nucleon structure from a light-front hamiltonian

Contact Info

Product

Resources

About