Recent results of (semi)leptonic decays of charm hadrons at BESIII
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866913826532753408 |
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| author | Pan, Xiang |
| author_facet | Pan, Xiang |
| contents | In this talk, we report the recent measurements of (semi)leptonic decays of charm mesons from the BESIII experiment, including $D^+\toμ^+ν_μ$, $D^+\toτ^+ν_τ$, $D^+\toη^\prime\ell^+ν_\ell$, and $D^{0(+)}\to\bar K\ell^+ν_\ell$ (where $\ell=e, μ$). These measurements provide the most precise or first determinations to date of the CKM matrix elements $|V_{cs(d)}|$, the decay constant $f_{D^+}$, and the hadronic form factors $f_+^{D^+\to η^\prime}(0)$ and $f_+^{D\to \bar K}(0)$. Lepton flavor universality of $e-μ$ and $τ-μ$ are also tested with these decays. Additionally, we present the first observation of the rare beta decay $Λ_c^+\to ne^+ν_e$ with machine learning of Graph Neural Network. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_05123 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Recent results of (semi)leptonic decays of charm hadrons at BESIII Pan, Xiang High Energy Physics - Experiment In this talk, we report the recent measurements of (semi)leptonic decays of charm mesons from the BESIII experiment, including $D^+\toμ^+ν_μ$, $D^+\toτ^+ν_τ$, $D^+\toη^\prime\ell^+ν_\ell$, and $D^{0(+)}\to\bar K\ell^+ν_\ell$ (where $\ell=e, μ$). These measurements provide the most precise or first determinations to date of the CKM matrix elements $|V_{cs(d)}|$, the decay constant $f_{D^+}$, and the hadronic form factors $f_+^{D^+\to η^\prime}(0)$ and $f_+^{D\to \bar K}(0)$. Lepton flavor universality of $e-μ$ and $τ-μ$ are also tested with these decays. Additionally, we present the first observation of the rare beta decay $Λ_c^+\to ne^+ν_e$ with machine learning of Graph Neural Network. |
| title | Recent results of (semi)leptonic decays of charm hadrons at BESIII |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2505.05123 |