Amplitude-Based Analysis of QED Radiative Corrections to Electroproduction of $η$-Mesons on Protons
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917434501365760 |
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| author | Illari, Isabella Afanasev, Andrei Briscoe, William J. Kashevarov, Victor L. Schmidt, Axel Strakovsky, Igor I. |
| author_facet | Illari, Isabella Afanasev, Andrei Briscoe, William J. Kashevarov, Victor L. Schmidt, Axel Strakovsky, Igor I. |
| contents | A formalism for radiative correction calculations in exclusive $η$ electroproduction on the proton is presented, extending the treatment developed for the pion channel. The EXCLURAD code is used in the radiative correction procedure with EtaMAID-2023 multipole amplitudes. The cross-section correction factor $δ$ varies by up to ${\sim}\,30\%$ across the resonance region $W = 1.49$-$2.0$ GeV at $E_{\rm beam} = 6.535$ GeV, with a local maximum near $W \simeq 1.66$ GeV driven by the $S_{11}(1535)$ and $S_{11}(1650)$ resonances. The beam-spin asymmetry is suppressed by 15-25% at the same kinematics. Numerical results covering $Q^2 = 0.3$-$4.0$ GeV$^2$ and the full angular range are provided for kinematics relevant to CLAS12 experiments at Jefferson Lab. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_22943 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Amplitude-Based Analysis of QED Radiative Corrections to Electroproduction of $η$-Mesons on Protons Illari, Isabella Afanasev, Andrei Briscoe, William J. Kashevarov, Victor L. Schmidt, Axel Strakovsky, Igor I. High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory A formalism for radiative correction calculations in exclusive $η$ electroproduction on the proton is presented, extending the treatment developed for the pion channel. The EXCLURAD code is used in the radiative correction procedure with EtaMAID-2023 multipole amplitudes. The cross-section correction factor $δ$ varies by up to ${\sim}\,30\%$ across the resonance region $W = 1.49$-$2.0$ GeV at $E_{\rm beam} = 6.535$ GeV, with a local maximum near $W \simeq 1.66$ GeV driven by the $S_{11}(1535)$ and $S_{11}(1650)$ resonances. The beam-spin asymmetry is suppressed by 15-25% at the same kinematics. Numerical results covering $Q^2 = 0.3$-$4.0$ GeV$^2$ and the full angular range are provided for kinematics relevant to CLAS12 experiments at Jefferson Lab. |
| title | Amplitude-Based Analysis of QED Radiative Corrections to Electroproduction of $η$-Mesons on Protons |
| topic | High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2604.22943 |