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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2501.02502 |
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| _version_ | 1866915091976290304 |
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| author | Kroll, P. |
| author_facet | Kroll, P. |
| contents | High-energy wide-angle photoproduction of pion-Delta final states is investigated within the handbag mechanism to twist-3 accuracy. In this approach the process amplitudes factorize in a hard partonic subprocess and and in form factors which represent 1/x-moments of p-Delta transition generalized parton distributions (GPDs) at zero skewness. The subproces, calculated to twist-3 accuracy, is the same as in pion photoproduction. The p-Delta GPDs are related to the proton-proton GPDs exploiting large-N_C results. The proton-proton GPDs as well as the twist-2 and twist-3 pion distribution amplitudes appearing in the subprocess are taken from other work. Reasonable agreement with experiment is found in this almost parameter-free analysis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_02502 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Wide-angle pion-Delta(1232) photoproduction Kroll, P. High Energy Physics - Phenomenology High-energy wide-angle photoproduction of pion-Delta final states is investigated within the handbag mechanism to twist-3 accuracy. In this approach the process amplitudes factorize in a hard partonic subprocess and and in form factors which represent 1/x-moments of p-Delta transition generalized parton distributions (GPDs) at zero skewness. The subproces, calculated to twist-3 accuracy, is the same as in pion photoproduction. The p-Delta GPDs are related to the proton-proton GPDs exploiting large-N_C results. The proton-proton GPDs as well as the twist-2 and twist-3 pion distribution amplitudes appearing in the subprocess are taken from other work. Reasonable agreement with experiment is found in this almost parameter-free analysis. |
| title | Wide-angle pion-Delta(1232) photoproduction |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2501.02502 |