Reappraisal of SU(3)-flavor breaking in $B\rightarrow DP$
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909230897823744 |
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| author | Davies, Jonathan Schacht, Stefan Skidmore, Nicola Soni, Amarjit |
| author_facet | Davies, Jonathan Schacht, Stefan Skidmore, Nicola Soni, Amarjit |
| contents | In light of recently found deviations of the experimental data from predictions from QCD factorization for $B_{(s)}\rightarrow D_{(s)}P$ decays, where $P=\{π,K\}$, we systematically probe the current status of the SU(3)$_F$ expansion from a fit to experimental branching ratio data without any further theory input. We find that the current data are in agreement with the power counting of the SU(3)$_F$ expansion. While the SU(3)$_F$ limit is excluded at $>5σ$, amplitude-level SU(3)$_F$-breaking contributions of $\sim 20\%$ suffice for an excellent description of the data. SU(3)$_F$ breaking is needed in tree ($>5σ$) and color-suppressed tree ($2.4σ$) diagrams. We are not yet sensitive to SU(3)$_F$ breaking in exchange diagrams. From the underlying SU(3)$_F$ parametrization we predict the unmeasured branching ratios $\mathcal{B}(\overline{B}_s^0\rightarrow π^- D^+) = 2 \mathcal{B}(\overline{B}_s^0\rightarrow π^0 D^0) = [0.3, 7.2] \times 10^{-6}$ of suppressed decays that can be searched for at the LHCb experiment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_04878 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Reappraisal of SU(3)-flavor breaking in $B\rightarrow DP$ Davies, Jonathan Schacht, Stefan Skidmore, Nicola Soni, Amarjit High Energy Physics - Phenomenology High Energy Physics - Experiment In light of recently found deviations of the experimental data from predictions from QCD factorization for $B_{(s)}\rightarrow D_{(s)}P$ decays, where $P=\{π,K\}$, we systematically probe the current status of the SU(3)$_F$ expansion from a fit to experimental branching ratio data without any further theory input. We find that the current data are in agreement with the power counting of the SU(3)$_F$ expansion. While the SU(3)$_F$ limit is excluded at $>5σ$, amplitude-level SU(3)$_F$-breaking contributions of $\sim 20\%$ suffice for an excellent description of the data. SU(3)$_F$ breaking is needed in tree ($>5σ$) and color-suppressed tree ($2.4σ$) diagrams. We are not yet sensitive to SU(3)$_F$ breaking in exchange diagrams. From the underlying SU(3)$_F$ parametrization we predict the unmeasured branching ratios $\mathcal{B}(\overline{B}_s^0\rightarrow π^- D^+) = 2 \mathcal{B}(\overline{B}_s^0\rightarrow π^0 D^0) = [0.3, 7.2] \times 10^{-6}$ of suppressed decays that can be searched for at the LHCb experiment. |
| title | Reappraisal of SU(3)-flavor breaking in $B\rightarrow DP$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2403.04878 |