Radiative corrections to the parity-violating spin asymmetry
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866911547587035136 |
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| author | Jakubassa-Amundsen, D. H. Roca-Maza, X. |
| author_facet | Jakubassa-Amundsen, D. H. Roca-Maza, X. |
| contents | The parity-violating spin asymmetry Apv for elastic electron scattering from spin-zero nuclei, together with its QED corrections, is evaluated non-perturbatively within the phase-shift analysis. Dispersion corrections, taking into account low-lying transient nuclear excitations, are estimated with the help of the lowest-order $γZ$ box diagrams. Collision energies between 5 $-$ 500 MeV are considered, and results are provided for the $^{12}$C and $^{208}$Pb target nuclei. In addition, we have evaluated Apv at GeV energies and small scattering angles -- relevant for the Pb Radius Experiment (PREx) -- revealing that the low-lying nuclear excited states give no measurable dispersive contribution. However, they are important at lower energies and backward angles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_15380 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Radiative corrections to the parity-violating spin asymmetry Jakubassa-Amundsen, D. H. Roca-Maza, X. Nuclear Theory Nuclear Experiment The parity-violating spin asymmetry Apv for elastic electron scattering from spin-zero nuclei, together with its QED corrections, is evaluated non-perturbatively within the phase-shift analysis. Dispersion corrections, taking into account low-lying transient nuclear excitations, are estimated with the help of the lowest-order $γZ$ box diagrams. Collision energies between 5 $-$ 500 MeV are considered, and results are provided for the $^{12}$C and $^{208}$Pb target nuclei. In addition, we have evaluated Apv at GeV energies and small scattering angles -- relevant for the Pb Radius Experiment (PREx) -- revealing that the low-lying nuclear excited states give no measurable dispersive contribution. However, they are important at lower energies and backward angles. |
| title | Radiative corrections to the parity-violating spin asymmetry |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2507.15380 |