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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2505.11492 |
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| _version_ | 1866915495858405376 |
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| author | Bhattacharya, Bhubanjyoti Bouchard, Marianne Hudy, Luke Jean, Alexandre London, David MacKenzie, Christopher |
| author_facet | Bhattacharya, Bhubanjyoti Bouchard, Marianne Hudy, Luke Jean, Alexandre London, David MacKenzie, Christopher |
| contents | Recently, $B\to PP$ decays ($B = \{B^0, B^+, B_s^0\}$, $P = \{ π, K \}$) were analyzed under the assumption of flavor SU(3) symmetry (SU(3)$_F$). Although the individual fits to $ΔS=0$ or $ΔS=1$ decays are good, it was found that the combined fit is very poor: there is a $3.6σ$ disagreement with the SU(3)$_F$ limit of the standard model (SM$_{\rm{SU(3)}_F}$). One can remove this discrepancy by adding SU(3)$_F$-breaking effects, but 1000\% SU(3)$_F$ breaking is required. In this paper, we extend this analysis to include decays in which there is an $η$ and/or $η'$ meson in the final state. We now find that the combined fit exhibits a $4.1σ$ discrepancy with the SM$_{\rm{SU(3)}_F}$, and 1000\% SU(3)$_F$-breaking effects are still required to explain the data. These results are rigorous, group-theoretically -- no theoretical assumptions have been made. But when one adds some theoretical input motivated by QCD factorization, the discrepancy with the SM$_{\rm{SU(3)}_F}$ grows to $4.9σ$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_11492 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anomalies in Hadronic $B$ Decays: an Update Bhattacharya, Bhubanjyoti Bouchard, Marianne Hudy, Luke Jean, Alexandre London, David MacKenzie, Christopher High Energy Physics - Phenomenology High Energy Physics - Experiment Recently, $B\to PP$ decays ($B = \{B^0, B^+, B_s^0\}$, $P = \{ π, K \}$) were analyzed under the assumption of flavor SU(3) symmetry (SU(3)$_F$). Although the individual fits to $ΔS=0$ or $ΔS=1$ decays are good, it was found that the combined fit is very poor: there is a $3.6σ$ disagreement with the SU(3)$_F$ limit of the standard model (SM$_{\rm{SU(3)}_F}$). One can remove this discrepancy by adding SU(3)$_F$-breaking effects, but 1000\% SU(3)$_F$ breaking is required. In this paper, we extend this analysis to include decays in which there is an $η$ and/or $η'$ meson in the final state. We now find that the combined fit exhibits a $4.1σ$ discrepancy with the SM$_{\rm{SU(3)}_F}$, and 1000\% SU(3)$_F$-breaking effects are still required to explain the data. These results are rigorous, group-theoretically -- no theoretical assumptions have been made. But when one adds some theoretical input motivated by QCD factorization, the discrepancy with the SM$_{\rm{SU(3)}_F}$ grows to $4.9σ$. |
| title | Anomalies in Hadronic $B$ Decays: an Update |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2505.11492 |