$B$ meson semileptonic decays from lattice QCD
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909574077874176 |
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| author | Aviles-Casco, Alejandro Vaquero |
| author_facet | Aviles-Casco, Alejandro Vaquero |
| contents | $B$ processes are a rich source of potential anomalies that could lead to the discovery of BSM physics. The long-standing tension between the inclusive and the exclusive determinations of the CKM matrix elements $|V_{xb}|$, or the current tensions in the $R(D)$-$R(D^\ast)$ plane are some examples of active areas of research where we might find signals of new physics. Heavy-to-heavy $B$ semileptonic decays, $B_{(s)}\to D^{(\ast)}_{(s)}\ellν$, and in particular, decays with a vector product ($D^\ast_{(s)}$) are especially interesting from an experimental point of view, but experiment and theory must walk together in order to reach conclusions in the intensity frontier. In this review I talk about the current status of the lattice-QCD calculations of the $B\to D^{\ast}\ellν$ form factors at non-zero recoil, I discuss the implications they have for the determination of $B$ anomalies, and finally I give some hints of what we can expect from future calculations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_07857 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $B$ meson semileptonic decays from lattice QCD Aviles-Casco, Alejandro Vaquero High Energy Physics - Phenomenology High Energy Physics - Lattice $B$ processes are a rich source of potential anomalies that could lead to the discovery of BSM physics. The long-standing tension between the inclusive and the exclusive determinations of the CKM matrix elements $|V_{xb}|$, or the current tensions in the $R(D)$-$R(D^\ast)$ plane are some examples of active areas of research where we might find signals of new physics. Heavy-to-heavy $B$ semileptonic decays, $B_{(s)}\to D^{(\ast)}_{(s)}\ellν$, and in particular, decays with a vector product ($D^\ast_{(s)}$) are especially interesting from an experimental point of view, but experiment and theory must walk together in order to reach conclusions in the intensity frontier. In this review I talk about the current status of the lattice-QCD calculations of the $B\to D^{\ast}\ellν$ form factors at non-zero recoil, I discuss the implications they have for the determination of $B$ anomalies, and finally I give some hints of what we can expect from future calculations. |
| title | $B$ meson semileptonic decays from lattice QCD |
| topic | High Energy Physics - Phenomenology High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2504.07857 |