Photoproduction $γp \to f_0(980) p$ in an effective Lagrangian approach
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arXiv
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866916363831869440 |
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| author | Wei, Neng-Chang Wang, Ai-Chao Huang, Fei |
| author_facet | Wei, Neng-Chang Wang, Ai-Chao Huang, Fei |
| contents | The most recent data on differential cross sections and photon beam asymmetries $Σ$ from the LEPS2/BGOegg Collaboration for the $γp \to f_0(980) p$ reaction are analyzed within a tree-level effective Lagrangian approach. The $t$-channel $ρ$ and $ω$ exchanges, the $u$- and $s$-channel $N$ exchanges, the interaction current, and the possible $s$-channel $N^*$ exchanges are taken into account in constructing the reaction amplitudes to reproduce the data. The results show that the contributions from either the $N(2040)3/2^+$ or the $N(2100)1/2^+$ resonance exchange in the $s$ channel are necessarily required to describe the LEPS2/BGOegg data and they dominate the differential cross sections of $γp \to f_0(980) p$. Further analysis shows that the contributions from the $t$-channel $ρ$ and $ω$ exchanges and the interaction current are rather small to both differential cross sections and photo beam asymmetries, and the contributions from $u$-channel $N$ exchange are considerable in the case of including $N(2040)3/2^+$ in the model while negligible in the case of including $N(2100)1/2^+$ in the model. Predictions of target asymmetries $T$ for $γp \to f_0(980) p$ are given, which can be examined by future experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_11352 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photoproduction $γp \to f_0(980) p$ in an effective Lagrangian approach Wei, Neng-Chang Wang, Ai-Chao Huang, Fei High Energy Physics - Phenomenology Nuclear Theory The most recent data on differential cross sections and photon beam asymmetries $Σ$ from the LEPS2/BGOegg Collaboration for the $γp \to f_0(980) p$ reaction are analyzed within a tree-level effective Lagrangian approach. The $t$-channel $ρ$ and $ω$ exchanges, the $u$- and $s$-channel $N$ exchanges, the interaction current, and the possible $s$-channel $N^*$ exchanges are taken into account in constructing the reaction amplitudes to reproduce the data. The results show that the contributions from either the $N(2040)3/2^+$ or the $N(2100)1/2^+$ resonance exchange in the $s$ channel are necessarily required to describe the LEPS2/BGOegg data and they dominate the differential cross sections of $γp \to f_0(980) p$. Further analysis shows that the contributions from the $t$-channel $ρ$ and $ω$ exchanges and the interaction current are rather small to both differential cross sections and photo beam asymmetries, and the contributions from $u$-channel $N$ exchange are considerable in the case of including $N(2040)3/2^+$ in the model while negligible in the case of including $N(2100)1/2^+$ in the model. Predictions of target asymmetries $T$ for $γp \to f_0(980) p$ are given, which can be examined by future experiments. |
| title | Photoproduction $γp \to f_0(980) p$ in an effective Lagrangian approach |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2408.11352 |