Determination of the $D\rightarrow ππ$ ratio of penguin over tree diagrams
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Acceso en línea: | |
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| _version_ | 1866914695552696320 |
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| author | Gavrilova, Margarita Grossman, Yuval Schacht, Stefan |
| author_facet | Gavrilova, Margarita Grossman, Yuval Schacht, Stefan |
| contents | We study the penguin over tree ratio in $D\rightarrow ππ$ decays. This ratio can serve as a probe for rescattering effects. Assuming the Standard Model and in the isospin limit, we derive expressions that relate both the magnitude and the phase of this ratio to direct CP asymmetries and branching fractions. We find that the current data suggest that rescattering is large. A dedicated experimental analysis with current and future data will be able to significantly reduce the errors on these determinations, and enable us to check if indeed there is significant rescattering in $D \to ππ$ decays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_10140 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Determination of the $D\rightarrow ππ$ ratio of penguin over tree diagrams Gavrilova, Margarita Grossman, Yuval Schacht, Stefan High Energy Physics - Phenomenology High Energy Physics - Experiment We study the penguin over tree ratio in $D\rightarrow ππ$ decays. This ratio can serve as a probe for rescattering effects. Assuming the Standard Model and in the isospin limit, we derive expressions that relate both the magnitude and the phase of this ratio to direct CP asymmetries and branching fractions. We find that the current data suggest that rescattering is large. A dedicated experimental analysis with current and future data will be able to significantly reduce the errors on these determinations, and enable us to check if indeed there is significant rescattering in $D \to ππ$ decays. |
| title | Determination of the $D\rightarrow ππ$ ratio of penguin over tree diagrams |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2312.10140 |