Measurements of semileptonic and leptonic beauty meson decays at Belle II
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866918122209935360 |
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| author | Martinov, Tommy |
| author_facet | Martinov, Tommy |
| contents | Three recent measurements of leptonic and semileptonic decays of $B$ mesons are presented here. All results use the full Belle II Run 1 $e^+e^- \to Υ(4S) \to B\bar{B}$ dataset of 365 fb$^{-1}$. We present one leptonic $B$ decay result: a measurement of the $B^+ \to τν$ branching fraction with a hadronic tagging method; and two semileptonic $B$ decay results: a determination of $|V_{cb}|$ using $B \to D \ell ν$ decays with an inclusive tagging method and a test of lepton flavour universality with measurements of $\mathcal{R}\left(D^+\right)$ and $\mathcal{R}\left(D^{*+}\right)$ using semileptonic $B$ tagging. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_08197 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Measurements of semileptonic and leptonic beauty meson decays at Belle II Martinov, Tommy High Energy Physics - Experiment Three recent measurements of leptonic and semileptonic decays of $B$ mesons are presented here. All results use the full Belle II Run 1 $e^+e^- \to Υ(4S) \to B\bar{B}$ dataset of 365 fb$^{-1}$. We present one leptonic $B$ decay result: a measurement of the $B^+ \to τν$ branching fraction with a hadronic tagging method; and two semileptonic $B$ decay results: a determination of $|V_{cb}|$ using $B \to D \ell ν$ decays with an inclusive tagging method and a test of lepton flavour universality with measurements of $\mathcal{R}\left(D^+\right)$ and $\mathcal{R}\left(D^{*+}\right)$ using semileptonic $B$ tagging. |
| title | Measurements of semileptonic and leptonic beauty meson decays at Belle II |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2508.08197 |