The $ρ$-meson electromagnetic form factors within the light-front quark model
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866912361243213824 |
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| author | Xu, Shuai Li, Xiao-Nan Wu, Xing-Gang |
| author_facet | Xu, Shuai Li, Xiao-Nan Wu, Xing-Gang |
| contents | 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 $G_{C,M,Q}(Q^2)$ of $ρ$-meson as well as the charged square radius $\langle r^2\rangle$, the magnetic moment $μ$ and the quadrupole moment $\bar Q$ 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 $S_{00}^+$. It is found that the ``$M\to M_{0}$" 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_02419 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The $ρ$-meson electromagnetic form factors within the light-front quark model Xu, Shuai Li, Xiao-Nan Wu, Xing-Gang High Energy Physics - Phenomenology 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 $G_{C,M,Q}(Q^2)$ of $ρ$-meson as well as the charged square radius $\langle r^2\rangle$, the magnetic moment $μ$ and the quadrupole moment $\bar Q$ 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 $S_{00}^+$. It is found that the ``$M\to M_{0}$" 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. |
| title | The $ρ$-meson electromagnetic form factors within the light-front quark model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.02419 |