An Assessment of Pseudoscalar and Vector Meson Electromagnetic Form Factors

Within the framework of the Dyson-Schwinger/Bethe-Salpeter equations of quantum chromodynamics, we investigate the electromagnetic form factors of pseudoscalar and vector mesons with different hidden-flavor, from light to heavy quark sectors, and compare the results with those of the single-pole vector meson dominance (VMD) model. It is found that the charge radius of vector meson is larger than that of its pseudoscalar counterpart. As the current-quark mass increases, the electric form factor of the vector meson tends to approach that of its pseudoscalar counterpart, and gradually deviates from the prediction of the VMD model.

Automated summary

Within the framework of quantum chromodynamics, we studied the electromagnetic form factors of pseudoscalar and vector mesons with different hidden flavor, comparing the results with the single-pole vector meson dominance (VMD) model. We found that the charge radius of the vector meson is larger than that of the pseudoscalar meson. As the current-quark mass increases, the electric form factor of the vector meson approaches that of the pseudoscalar meson and deviates from the prediction of the VMD model.