$B_{s}^0\to K^0\overline{K}{}^0$ beyond the Standard Model
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916786189893632 |
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| author | Grossman, Yuval Nir, Yosef Neubert, Matthias Shpilman, Yogev Viernik, Yehonatan |
| author_facet | Grossman, Yuval Nir, Yosef Neubert, Matthias Shpilman, Yogev Viernik, Yehonatan |
| contents | Within the Standard Model, the branching fraction of the rare decay $B_s\to K^0\bar K^0$ is related to other decay rates and CP asymmetries through the approximate $SU(3)$ flavor symmetry of the strong interactions and the heavy-quark limit. Three such relations were shown to be violated at a level of about $3σ$ each. By means of a systematic search for new-physics explanations of these puzzles, we find that possible solutions are highly fine-tuned and either excluded by other data or rather implausible. The tight correlation between $B_s\to K\bar K$ and $B\toπK$ decays, which is maintained even in the presence of flavor-specific new-physics operators, plays a central role in our analysis. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_13506 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $B_{s}^0\to K^0\overline{K}{}^0$ beyond the Standard Model Grossman, Yuval Nir, Yosef Neubert, Matthias Shpilman, Yogev Viernik, Yehonatan High Energy Physics - Phenomenology Within the Standard Model, the branching fraction of the rare decay $B_s\to K^0\bar K^0$ is related to other decay rates and CP asymmetries through the approximate $SU(3)$ flavor symmetry of the strong interactions and the heavy-quark limit. Three such relations were shown to be violated at a level of about $3σ$ each. By means of a systematic search for new-physics explanations of these puzzles, we find that possible solutions are highly fine-tuned and either excluded by other data or rather implausible. The tight correlation between $B_s\to K\bar K$ and $B\toπK$ decays, which is maintained even in the presence of flavor-specific new-physics operators, plays a central role in our analysis. |
| title | $B_{s}^0\to K^0\overline{K}{}^0$ beyond the Standard Model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.13506 |