Hypercentral Constituent Quark Model with a Meson Cloud

Chen, Dian-Yong; Dong, Yubing; Giannini, M. M.; Santopinto, E.

doi:10.1016/j.nuclphysa.2006.10.004

Cited by 15 publications

(8 citation statements)

References 25 publications

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“…The meson cloud of the nucleon, undoubtedly, plays a relevant role in the study of low energy electroweak properties of the nucleon. The meson cloud model, where the nucleon is considered as a system of three valence quarks surrounded by a meson cloud [1][2][3][4][5][6][7][8][9][10], has recently been employed to study the generalized parton distribution [11,12], nucleon electroweak form factors [13][14][15][16][17][18], nucleon strangeness [19,20], etc. In Refs.…”

Section: Introductionmentioning

confidence: 99%

Comparisons of magnetic charge and axial charge meson cloud distributions in the PCQM

Liu

Khosonthongkee

et al. 2017

Sci Rep

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The meson cloud distributions in r-space are extracted from the nucleon electromagnetic and axial form factors which are derived in the perturbative chiral quark model. The theoretical results indicate that the magnetic charge and axial charge distributions of the three-quark core have the similar distributions in r-space, the magnetic charge distributions of the meson cloud and three-quark core are more or less in the same region and peak at distances of around 0.4 fm, which is in good agreement with the finding of works in the framework of chiral perturbation theory, but the axial charge meson cloud distributes mainly inside the three-quark core.

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Section: Introductionmentioning

confidence: 99%

Comparisons of magnetic charge and axial charge meson cloud distributions in the PCQM

Liu

Khosonthongkee

et al. 2017

Sci Rep

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“…The problem of considering the meson cloud surrounding a system of three valence quarks has been addressed already in the past in a variety of papers (see, e.g., [34,35,36,37,38,39,40,41,42] and references therein). Along the lines originally proposed in Refs.…”

mentioning

confidence: 99%

Electroweak structure of the nucleon, meson cloud, and light-cone wave functions

Pasquini¹,

Boffi

2007

Phys. Rev. D

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The meson-cloud model of the nucleon consisting of a system of three valence quarks surrounded by a meson cloud is applied to study the electroweak structure of the proton and neutron. Light-cone wavefunctions are derived for the dressed nucleon as pictured to be part of the time a bare nucleon and part of the time a baryon-meson system. Configurations are considered where the baryon can be a nucleon or a ∆ and the meson can be a pion as well as a vector meson such as the ρ or the ω. An overall good description of the electroweak form factors is obtained.The contribution of the meson cloud is small and only significant at low Q 2 . Mixedsymmetry S ′ -wave components in the wavefunction are most important to reproduce the neutron electric form factor. Charge and magnetization densities are deduced as a function of both the radial distance from the nucleon center and the transverse distance with respect to the direction of the three-momentum transfer. In the latter case a central negative charge is found for the neutron. The up and down quark distributions associated with the Fourier transform of the axial form factor have opposite sign, with the consequence that the probability to find an up (down) quark with positive helicity is maximal when it is (anti)aligned with the proton helicity.

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“…This approach is very useful for preliminary calculations (see ref. [71]), however a more promising method is provided by the inclusion of dressing mechanisms directly at the quark level. This means in particular the inclusion of higher Fock components in the baryon state:…”

Section: Longitudinal and Transverse Helicity Amplitudes Of Nucleon Rmentioning

confidence: 99%

The physical meaning of scattering matrix singularities in coupled-channel formalisms⋆

et al. 2008

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Hypercentral Constituent Quark Model with a Meson Cloud

Cited by 15 publications

References 25 publications

Comparisons of magnetic charge and axial charge meson cloud distributions in the PCQM

Comparisons of magnetic charge and axial charge meson cloud distributions in the PCQM

Electroweak structure of the nucleon, meson cloud, and light-cone wave functions

The physical meaning of scattering matrix singularities in coupled-channel formalisms⋆

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