Radiative corrections to the forward-backward asymmetry in $e^+e^-\toπ^+π^-$
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2022
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| _version_ | 1866916629929000960 |
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| author | Colangelo, Gilberto Hoferichter, Martin Monnard, Joachim de Elvira, Jacobo Ruiz |
| author_facet | Colangelo, Gilberto Hoferichter, Martin Monnard, Joachim de Elvira, Jacobo Ruiz |
| contents | We present a calculation of the $C$-odd radiative corrections to $e^+e^-\to π^+π^-$ in a dispersive formalism, concentrating on the leading pion-pole contribution in the virtual box diagrams. In particular, we show how the effect of a general pion vector form factor in the loop integral can be incorporated in a model-independent way and how the cancellation of infrared singularities proceeds in this case. The numerical results, dominated by the infrared enhanced contributions, indicate significant corrections beyond scalar QED, essentially confirming recent findings in generalized vector-meson-dominance models. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2207_03495 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Radiative corrections to the forward-backward asymmetry in $e^+e^-\toπ^+π^-$ Colangelo, Gilberto Hoferichter, Martin Monnard, Joachim de Elvira, Jacobo Ruiz High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory We present a calculation of the $C$-odd radiative corrections to $e^+e^-\to π^+π^-$ in a dispersive formalism, concentrating on the leading pion-pole contribution in the virtual box diagrams. In particular, we show how the effect of a general pion vector form factor in the loop integral can be incorporated in a model-independent way and how the cancellation of infrared singularities proceeds in this case. The numerical results, dominated by the infrared enhanced contributions, indicate significant corrections beyond scalar QED, essentially confirming recent findings in generalized vector-meson-dominance models. |
| title | Radiative corrections to the forward-backward asymmetry in $e^+e^-\toπ^+π^-$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2207.03495 |