Abstract
The charge form factors of baryon octet are studied in the perturbative chiral quark model (PCQM). The relativistic quark wave function is extracted by fitting the theoretical results of the nucleon charge form factors to the experimental data and the predetermined quark wave function is applied to study the charge form factors of other octet baryons. The PCQM results are found, based on the predetermined quark wave function, in good agreement with the experimental data.
Highlights
The perturbative chiral quark model (PCQM) was developed a decade ago[1, 2] and has been successfully applied to the electromagnetic and axial form factors of baryons,[3,4,5,6] low-energy meson-baryon scatterings,[7] electromagnetic excitations of nucleon resonances,[8] nucleon polarizabilities,[9] neutron electric dipole form factor,[10] etc
The PCQM theoretical results[3,4,5,6] of the electromagnetic and axial form factors of baryons are in good agreement with experimental data only at very low momentum transfer, descending quickly with the momentum transfer increasing
In those works,[3,4,5,6] a variational Gaussian ansatz have been employed for the quark wave function
Summary
The perturbative chiral quark model (PCQM) was developed a decade ago[1, 2] and has been successfully applied to the electromagnetic and axial form factors of baryons,[3,4,5,6] low-energy meson-baryon scatterings,[7] electromagnetic excitations of nucleon resonances,[8] nucleon polarizabilities,[9] neutron electric dipole form factor,[10] etc. The PCQM theoretical results[3,4,5,6] of the electromagnetic and axial form factors of baryons are in good agreement with experimental data only at very low momentum transfer, descending quickly with the momentum transfer increasing. In those works,[3,4,5,6] a variational Gaussian ansatz have been employed for the quark wave function. One may argue that it is the Gaussian-type quark This is an Open Access article published by World Scientific Publishing Company.
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