Meson cloud contributions to baryon axial form factors

Abstract

The axial form factor as well as the axial charge of octet baryons are studied in the perturbative chiral quark model (PCQM) with the quark wave functions predetermined by fitting the theoretical results of the proton charge form factor to experimental data. The theoretical results are found, based on the predetermined quark wave functions, in good agreement with experimental data and lattice values. This may indicate that the electric charge and axial charge distributions of the constituent quarks are the same. The study reveals that the meson cloud plays an important role in the axial charge of octet baryons, contributing 30%-40% to the total values, and strange sea quarks have a considerable contribution to the axial charge of the $\Sigma$ and $\Xi$.

arXiv comment6 pages, 4 figures, 5 tables

References in corpus (35)

• Axial structure of the nucleon
• Nucleon electromagnetic form factors
• Nucleon Charges and Electromagnetic Form Factors from 2+1+1-Flavor Lattice QCD
• Nucleon form factors with 2+1 flavor dynamical domain-wall fermions
• Axial Nucleon form factors from lattice QCD
• Electromagnetic Form Factors of the Nucleon in an Improved Quark Model
• Nucleon Electromagnetic Form Factors from Lattice QCD using 2+1 Flavor Domain Wall Fermions on Fine Lattices and Chiral Perturbation Theory
• Sigma-term physics in the perturbative chiral quark model
• Nucleon axial and pseudoscalar form factors from the covariant Faddeev equation
• First Calculation of Hyperon Axial Couplings from Lattice QCD
• Electromagnetic Structure of the Nucleon in the Perturbative Chiral Quark Model
• Octet baryon electromagnetic form factors in nuclear medium
• Nucleon Axial Form Factor from Lattice QCD
• piN scattering and electromagnetic corrections in the perturbative chiral quark model
• Octet baryon electromagnetic form factors in a relativistic quark model
• Electromagnetic form factors of the baryon octet in the perturbative chiral quark model
• Strange Baryon Electromagnetic Form Factors and SU(3) Flavor Symmetry Breaking
• Nucleon and gamma N -> Delta lattice form factors in a constituent quark model
• Nucleon Form Factors of the Isovector Axial-Vector Current: Situation of Experiments and Theory
• Electromagnetic couplings of the ChPT Lagrangian from the perturbative chiral quark model
• Axial charges of octet and decuplet baryons
• Axial Charges of Octet Baryons in Two-flavor Lattice QCD
• Simple Quark Model with Chiral Phenomenology
• The neutron electric dipole form factor in the perturbative chiral quark model
• Covariant spectator quark model description of the ${\gamma }^{\ast }\Lambda \to {\Sigma }^0$ transition
• Axial form factor of the nucleon in the perturbative chiral quark model
• Hyperon Axial Charges in Two-Flavor Chiral Perturbation Theory
• Electromagnetic nucleon-delta transition in the perturbative chiral quark model
• Study of Lattice QCD Form Factors Using the Extended Gari-Krumpelmann Model
• Chiral Corrections and the Axial Charge of the Delta
• Nucleon polarizabilities in the perturbative chiral quark model
• Isovector axial-vector form factors of octet baryons in QCD
• Study of baryon octet electromagnetic form factors in perturbative chiral quark model
• Dependence of nucleon properties on pseudoscalar meson masses
• Spectrum of the excited $N^{\ast }$ and ${\Delta }^{\ast }$ baryons in a relativistic chiral quark model

Cited by in corpus (9)

• Axial form factors of the octet baryons in a covariant quark model
• Pentaquarks and strange tetraquark mesons
• Holographic estimate of the meson cloud contribution to nucleon axial form factor
• Electromagnetic and Axial-Vector Form Factors of the Quarks and Nucleon
• Weak interaction axial form factors of the octet baryons in nuclear medium
• Axial transition form factors of octet baryons in the perturbative chiral quark model
• Chiral extrapolation of nucleon axial charge $g_A$ in effective field theory
• Analysis of excited quark propagator effects on neutron charge form factor
• Comparisons of electric charge and axial charge meson cloud distributions in the PCQM