Octet baryon electromagnetic form factors in a relativistic quark model

Abstract

We study the octet baryon electromagnetic properties by applying the covariant spectator quark model, and provide covariant parametrization that can be used to study baryon electromagnetic reactions. While we use the lattice QCD data in the large pion mass regime (small pion cloud effects) to determine the parameters of the model in the valence quark sector, we use the nucleon physical and octet baryon magnetic moment data to parameterize the pion cloud contributions. The valence quark contributions for the octet baryon electromagnetic form factors are estimated by extrapolating the lattice parametrization in the large pion mass regime to the physical regime. As for the pion cloud contributions, we parameterize them in a covariant, phenomenological manner, combined with SU(3) symmetry. We also discuss the impact of the pion cloud effects on the octet baryon electromagnetic form factors and their radii.

Published in PRD. Text modified according to the PRD journal style and format. 28 pages, 15 figures, 8 tables

References in corpus (26)

• High-precision determination of the electric and magnetic form factors of the proton
• Nucleon Electromagnetic Form Factors
• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q^2 = 8.5 GeV^2
• Measurements of the Electric Form Factor of the Neutron up to Q2=3.4 GeV2 using the Reaction He3(e,e'n)pp
• The nucleon electromagnetic form factors from Lattice QCD
• A pure S-wave covariant model for the nucleon
• The nucleon to Delta electromagnetic transition form factors in lattice QCD
• The Charge Form Factor of the Neutron at Low Momentum Transfer from the ${}^2\vec{\mathrm{H}}(\vec{\mathrm{e}},{\mathrm{e}}^{\prime }\mathrm{n})\mathrm{p}$ Reaction
• D-state effects in the electromagnetic N-Delta transition
• A relativistic quark model for the Omega- electromagnetic form factors
• A Covariant model for the nucleon and the $\Delta$
• Chiral extrapolation of nucleon magnetic form factors
• Chiral extrapolation of octet-baryon charge radii
• A covariant model for the gamma N -> N(1535) transition at high momentum transfer
• Electromagnetic form factors of the baryon octet in the perturbative chiral quark model
• A model for the Delta(1600) resonance and gamma N -> Delta(1600) transition
• Extracting the Omega- electric quadrupole moment from lattice QCD data
• Fixed-axis polarization states: covariance and comparisons
• A simple relation between the gamma N -> N(1535) helicity amplitudes
• Light-cone Distribution Amplitudes of Xi and their Applications
• Electromagnetic form factors of the Delta in a S-wave approach
• Electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons in an alternative baryonic current approach
• Octet baryon magnetic moments from QCD sum rules
• The Pion Cloud of the Nucleon: Facts and popular Fantasies
• Chiral symmetry breaking and electromagnetic structure of the nucleon

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• Semirelativistic approximation to the ${\gamma }^{\ast }N\to N(1520)$ and ${\gamma }^{\ast }N\to N(1535)$ transition form factors
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• Systematic study of octet-baryon electromagnetic form factors in covariant chiral perturbation theory
• Covariant model for the Dalitz decay of the $N(1535)$ resonance
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• Analytic parametrizations of the ${\gamma }^{\ast }N\to N(1440)$ form factors inspired by Light-Front holography
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• Gravitational form factors of hyperons in light-cone QCD
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• Study of the in-medium nucleon electromagnetic form factors using a light-front nucleon wave function combined with the quark-meson coupling model
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• Weak interaction axial form factors of the octet baryons in nuclear medium
• Meson cloud contributions to the Dalitz decays of decuplet to octet baryons
• Electroweak form factors of baryons in dense nuclear matter
• Analysis of excited quark propagator effects on neutron charge form factor
• Electromagnetic form factors of ${\Lambda }_c$ in the Bethe-Salpeter equation approach
• A covariant model for the ${\gamma }^{\ast }N\to N^{\ast }(1520)$ reaction
• A Relativistic Model for the Electromagnetic Structure of Baryons from the 3rd Resonance Region
• A covariant model for the negative parity resonances of the nucleon
• Comparisons of electric charge and axial charge meson cloud distributions in the PCQM