Time-like electromagnetic form factors of $Λ,~Σ$ and $Ξ^{+}$ in a light-front quark model
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866914562217869312 |
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| author | Lih, Chong-Chung Geng, Chao-Qiang |
| author_facet | Lih, Chong-Chung Geng, Chao-Qiang |
| contents | We use the light front quark model to investigate the form factors in the $e^{+}e^{-} \to B\bar{B}$ collision proceses with $B=Λ,~Σ$ and $Ξ$. These form factor behaviors are calculated based on the Bethe-Salpeter formalism with $q^{+} > 0$ to effectively account for non-valence contributions. We show that our results of the $q^2$-dependent form factors closely match the BESIII data. In particalar, we obtain that $|G_{eff}| = (0.921,~0.098,~0.189$) and $R =|$$G_E\over G_M$$|= (0.97,~0.89$,~$0.936$) for $e^{+} e^{-}\to Λ\barΛ$,~$Σ^{+} Σ^{-},~Ξ^{+} Ξ^{+})$ which $q^2 = (5.74,~6.0,~7.0)$ GeV$^2$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_01124 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Time-like electromagnetic form factors of $Λ,~Σ$ and $Ξ^{+}$ in a light-front quark model Lih, Chong-Chung Geng, Chao-Qiang High Energy Physics - Phenomenology High Energy Physics - Experiment We use the light front quark model to investigate the form factors in the $e^{+}e^{-} \to B\bar{B}$ collision proceses with $B=Λ,~Σ$ and $Ξ$. These form factor behaviors are calculated based on the Bethe-Salpeter formalism with $q^{+} > 0$ to effectively account for non-valence contributions. We show that our results of the $q^2$-dependent form factors closely match the BESIII data. In particalar, we obtain that $|G_{eff}| = (0.921,~0.098,~0.189$) and $R =|$$G_E\over G_M$$|= (0.97,~0.89$,~$0.936$) for $e^{+} e^{-}\to Λ\barΛ$,~$Σ^{+} Σ^{-},~Ξ^{+} Ξ^{+})$ which $q^2 = (5.74,~6.0,~7.0)$ GeV$^2$. |
| title | Time-like electromagnetic form factors of $Λ,~Σ$ and $Ξ^{+}$ in a light-front quark model |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2601.01124 |