The emission of soft-photons and the LBK theorem, revisited
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916080466788352 |
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| author | Balsach, Roger Bonocore, Domenico Kulesza, Anna |
| author_facet | Balsach, Roger Bonocore, Domenico Kulesza, Anna |
| contents | Predictions for processes involving soft photons, up to next-to-leading power (NLP) in the photon energy, can be obtained using the Low-Burnett-Kroll (LBK) theorem. The consistency of the theorem has been a recent topic of investigation since it is traditionally formulated in terms of a non-radiative amplitude, which is evaluated with unphysical momenta. We address such questions and propose a formulation of the LBK theorem which relies on the evaluation of the non-radiative amplitude with on-shell, physical momenta. We use this form to numerically study the impact of NLP contributions to cross-sections for $pp$ and $e^-e^+$ processes involving soft-photon emission. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_01820 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The emission of soft-photons and the LBK theorem, revisited Balsach, Roger Bonocore, Domenico Kulesza, Anna High Energy Physics - Phenomenology Predictions for processes involving soft photons, up to next-to-leading power (NLP) in the photon energy, can be obtained using the Low-Burnett-Kroll (LBK) theorem. The consistency of the theorem has been a recent topic of investigation since it is traditionally formulated in terms of a non-radiative amplitude, which is evaluated with unphysical momenta. We address such questions and propose a formulation of the LBK theorem which relies on the evaluation of the non-radiative amplitude with on-shell, physical momenta. We use this form to numerically study the impact of NLP contributions to cross-sections for $pp$ and $e^-e^+$ processes involving soft-photon emission. |
| title | The emission of soft-photons and the LBK theorem, revisited |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.01820 |