On the Coulomb corrections in nuclear beta decay
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913661637885952 |
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| author | Alviani, Edoardo Falkowski, Adam |
| author_facet | Alviani, Edoardo Falkowski, Adam |
| contents | We propose a Lorentz invariant and little group covariant description of beta decay amplitudes relying on on-shell amplitude methods and the spinor variables for massive particles. The framework is employed to calculate Coulomb corrections to the decay amplitude and their contribution to T -odd correlation coefficients, including the D parameter. In the SM limit we recover the known results for the Coulomb contributions to D and update their numerical values. We also calculate new subleading contributions to D in the presence of non-standard scalar and tensor interactions. We also point out that two other T -odd correlation coefficients are generated in the SM at the same order as the D parameter, and provide their numerical values for selected transitions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_17702 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On the Coulomb corrections in nuclear beta decay Alviani, Edoardo Falkowski, Adam High Energy Physics - Phenomenology We propose a Lorentz invariant and little group covariant description of beta decay amplitudes relying on on-shell amplitude methods and the spinor variables for massive particles. The framework is employed to calculate Coulomb corrections to the decay amplitude and their contribution to T -odd correlation coefficients, including the D parameter. In the SM limit we recover the known results for the Coulomb contributions to D and update their numerical values. We also calculate new subleading contributions to D in the presence of non-standard scalar and tensor interactions. We also point out that two other T -odd correlation coefficients are generated in the SM at the same order as the D parameter, and provide their numerical values for selected transitions. |
| title | On the Coulomb corrections in nuclear beta decay |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.17702 |