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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2605.03209 |
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| _version_ | 1866911646557929472 |
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| author | Hernández-Pinto, R. J. Gutiérrez-Guerrero, L. X. Bedolla, M. A. Uribe-Ramírez, J. P. Bashir, A. |
| author_facet | Hernández-Pinto, R. J. Gutiérrez-Guerrero, L. X. Bedolla, M. A. Uribe-Ramírez, J. P. Bashir, A. |
| contents | We employ a symmetry-preserving treatment of the contact interaction within the coupled for- malism of Schwinger-Dyson and Bethe-Salpeter equations to calculate the elastic form factors of axial-vector mesons. In this study, we present the computation of the charge radii, magnetic mo- ments, and quadrupole moments of axial-vector mesons, including those composed of light quarks, heavy quarks or a light and a heavy quark. Our findings indicate that the electric form factor for axial-vector mesons, like that of vector mesons, crosses zero. Furthermore, this crossing occurs at a lower value for axial-vector mesons than for vector mesons. The results for vector-axial mesons follow a similar hierarchy in charge radii as observed for S, PS, and V mesons, with radii decreasing as the mass of the dressed quarks increases. We also include a term associated with the anoma- lous magnetic moment in the quark-photon vertex. This term has a noticeable impact on both the axial-vector magnetic moment and quadrupole moment, leading to significant percentage changes in their values. We compare our results with those obtained from other models whenever available. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_03209 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Elastic Form Factors of Axial-Vector Mesons: A Contact Interaction Exploration Hernández-Pinto, R. J. Gutiérrez-Guerrero, L. X. Bedolla, M. A. Uribe-Ramírez, J. P. Bashir, A. High Energy Physics - Phenomenology We employ a symmetry-preserving treatment of the contact interaction within the coupled for- malism of Schwinger-Dyson and Bethe-Salpeter equations to calculate the elastic form factors of axial-vector mesons. In this study, we present the computation of the charge radii, magnetic mo- ments, and quadrupole moments of axial-vector mesons, including those composed of light quarks, heavy quarks or a light and a heavy quark. Our findings indicate that the electric form factor for axial-vector mesons, like that of vector mesons, crosses zero. Furthermore, this crossing occurs at a lower value for axial-vector mesons than for vector mesons. The results for vector-axial mesons follow a similar hierarchy in charge radii as observed for S, PS, and V mesons, with radii decreasing as the mass of the dressed quarks increases. We also include a term associated with the anoma- lous magnetic moment in the quark-photon vertex. This term has a noticeable impact on both the axial-vector magnetic moment and quadrupole moment, leading to significant percentage changes in their values. We compare our results with those obtained from other models whenever available. |
| title | Elastic Form Factors of Axial-Vector Mesons: A Contact Interaction Exploration |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2605.03209 |