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

Abstract

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 electric charge and axial charge distributions of the three-quark core are the same, 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 2 $\mathrm{Ge}{\mathrm{V}}^{-1}$, but the axial charge meson cloud distributes mainly inside the three-quark core.

arXiv comment6 pages, 6 figures

References in corpus (18)

• A Coherent Interpretation of the Form Factors of the Nucleon in Terms of a Pion Cloud and Constituent Quarks
• Electromagnetic Structure of the Nucleon in the Perturbative Chiral Quark Model
• Virtual meson cloud of the nucleon and generalized parton distributions
• Electroweak structure of the nucleon, meson cloud and light-cone wavefunctions
• piN scattering and electromagnetic corrections in the perturbative chiral quark model
• Octet baryon electromagnetic form factors in a relativistic quark model
• On the pion cloud of the nucleon
• The role of $qqqq\bar{q}$ components in the nucleon and the N(1440) resonance
• Phenomenological quark model for baryon magnetic moments and beta decay ratios ($G_A/G_V$)
• Axial form factors of the octet baryons in a covariant quark model
• The neutron charge form factor in helium-3
• Axial form factor of the nucleon in the perturbative chiral quark model
• Generalized parton distributions in a meson cloud model
• Meson cloud contributions to baryon axial form factors
• Hypercentral Constituent Quark Model with a Meson Cloud
• Study of baryon octet electromagnetic form factors in perturbative chiral quark model
• Can the meson cloud explain the nucleon strangeness?
• Neutron Charge Density from Simple Pion Cloud Models