The ρ-meson electromagnetic form factors within the light-front quark model

2025/05/05 by Xu, Shuai, Li, Xiao-Nan, Wu, Xing-Gang
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2505.02419

Abstract

In this paper, we study the ρ-meson electromagnetic form factors (EMFFs) within the framework of light-front quark model (LFQM). The physical form factors G_C,M,Q(Q²) of ρ-meson as well as the charged square radius ⟨ r²⟩, the magnetic moment μ and the quadrupole moment Q are calculated, which describe the behaviors of EMFFs at zero momentum transfer. Using the type-II replacement, we find that the zero-mode does contribute zero to the matrix element S₀₀⁺. It is found that the ``M→ M₀" replacement improves angular condition remarkably, which permits different prescriptions of ρ-meson EMFFs give the consistent results. The residue tiny violation of angular condition needs other explanations than the zero-mode contributions. Our results indicate that the relativistic effects or interaction internal structure are weaken in the zero-binding limit. This work is also applied for the other spin-1 particles.

Related

• The Electromagnetic Form Factors of Pseudoscalar Mesons within the Light-Front Quark Model
• ρ-Meson Form Factors in the Point Form
• Meson electromagnetic form factors in a relativistic quark model
• Space-like meson electromagnetic form factor in a relativistic quark model
• Medium effects on the electromagnetic form factors of the ρ meson