Coupled-channel contributions to the GDH sum rule from the Jülich-Bonn approach
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866908637179412480 |
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| author | Schneider, Carolin Rönchen, Deborah Hanhart, Christoph Meißner, Ulf-G. |
| author_facet | Schneider, Carolin Rönchen, Deborah Hanhart, Christoph Meißner, Ulf-G. |
| contents | We study the Gerasimov-Drell-Hearn (GDH) sum rule within a dynamical coupled-channel approach, the Jülich-Bonn model for light baryon resonances based on fits to an extensive data base of pion and photon induced data. Recently published photoproduction data for different observables with $πN$ and $ηN$ final states are analyzed simultaneously with older data for the reactions $πN\to πN$, $ηN$, $KΛ$, $KΣ$ and $γp\toπN$, $ηN$, $KΛ$, $KΣ$. The impact of the new data on the resonance spectrum is investigated and the contribution of the individual channels to the GDH integral is determined. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_00598 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Coupled-channel contributions to the GDH sum rule from the Jülich-Bonn approach Schneider, Carolin Rönchen, Deborah Hanhart, Christoph Meißner, Ulf-G. Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment We study the Gerasimov-Drell-Hearn (GDH) sum rule within a dynamical coupled-channel approach, the Jülich-Bonn model for light baryon resonances based on fits to an extensive data base of pion and photon induced data. Recently published photoproduction data for different observables with $πN$ and $ηN$ final states are analyzed simultaneously with older data for the reactions $πN\to πN$, $ηN$, $KΛ$, $KΣ$ and $γp\toπN$, $ηN$, $KΛ$, $KΣ$. The impact of the new data on the resonance spectrum is investigated and the contribution of the individual channels to the GDH integral is determined. |
| title | Coupled-channel contributions to the GDH sum rule from the Jülich-Bonn approach |
| topic | Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2508.00598 |