Charmed baryon decays at BESIII
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866910134879387648 |
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| author | Yu, Xudong |
| author_facet | Yu, Xudong |
| contents | BESIII has accumulated 4.5 fb$^{-1}$ of $e^+e^-$ collision data in the 4.6 to 4.7 GeV energy range, corresponding to the world's largest sample of $Λ_c^+\barΛ_c^-$ pairs. This paper summarizes recent BESIII results on charmed-baryon decays, including the observation of the rare semi-leptonic decay $Λ_c^+\to ne^+ν_e$ using a Graph Neural Network, the first measurement of the decay asymmetry in the pure $W$-exchange decay $Λ_c^+\toΞ^0K^+$, and branching fraction measurements of the inclusive decays $Λ_c^+\to Xe^+ν_e$ and $\barΛ_c^-\to \bar{n}X$. We also report partial wave analyses of $Λ_c^+\toΛπ^+π^0$ and $Λ_c^+\toΛπ^+η$, measurements of Cabibbo-suppressed decays such as $Λ_c^+\to pπ^0$, and studies of $K_S^0-K_L^0$ asymmetries in $Λ_c^+$ decays. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_14716 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Charmed baryon decays at BESIII Yu, Xudong High Energy Physics - Experiment High Energy Physics - Phenomenology BESIII has accumulated 4.5 fb$^{-1}$ of $e^+e^-$ collision data in the 4.6 to 4.7 GeV energy range, corresponding to the world's largest sample of $Λ_c^+\barΛ_c^-$ pairs. This paper summarizes recent BESIII results on charmed-baryon decays, including the observation of the rare semi-leptonic decay $Λ_c^+\to ne^+ν_e$ using a Graph Neural Network, the first measurement of the decay asymmetry in the pure $W$-exchange decay $Λ_c^+\toΞ^0K^+$, and branching fraction measurements of the inclusive decays $Λ_c^+\to Xe^+ν_e$ and $\barΛ_c^-\to \bar{n}X$. We also report partial wave analyses of $Λ_c^+\toΛπ^+π^0$ and $Λ_c^+\toΛπ^+η$, measurements of Cabibbo-suppressed decays such as $Λ_c^+\to pπ^0$, and studies of $K_S^0-K_L^0$ asymmetries in $Λ_c^+$ decays. |
| title | Charmed baryon decays at BESIII |
| topic | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.14716 |