Semileptonic decay of $Λ_b^0 \to Λ_c (2860)^+/Λ_c(2625)^+\ell^-\overlineν_\ell$ within QCD light-cone sum rules
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866910248331116544 |
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| author | Duan, Hui-Hui Feng, Jia-Bao Liu, Feng-Mei Chang, Qin |
| author_facet | Duan, Hui-Hui Feng, Jia-Bao Liu, Feng-Mei Chang, Qin |
| contents | In this work, we calculate the transition form factors for the weak decays $Λ_b^0 \to Λ_c(2860)^+$ and $Λ_b^0 \to Λ_c(2625)^+$ using QCD light-cone sum rules, and compute the branching fractions of the corresponding semileptonic decays $Λ_b^0 \to Λ_c(2860)^+ \ell^- \barν_\ell$ and $Λ_b^0 \to Λ_c(2625)^+ \ell^- \barν_\ell$. Our predicted branching fraction for $Λ_b^0 \to Λ_c(2625)^+ \ell^- \barν_\ell$ is consistent with experimental data and other theoretical predictions, validating the reliability of our method. On this basis, we also present the branching fraction of $Λ_b^0 \to Λ_c(2860)^+ \ell^- \barν_\ell$. These results may serve as a theoretical reference for future experimental measurements of this decay channel. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_23716 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Semileptonic decay of $Λ_b^0 \to Λ_c (2860)^+/Λ_c(2625)^+\ell^-\overlineν_\ell$ within QCD light-cone sum rules Duan, Hui-Hui Feng, Jia-Bao Liu, Feng-Mei Chang, Qin High Energy Physics - Phenomenology In this work, we calculate the transition form factors for the weak decays $Λ_b^0 \to Λ_c(2860)^+$ and $Λ_b^0 \to Λ_c(2625)^+$ using QCD light-cone sum rules, and compute the branching fractions of the corresponding semileptonic decays $Λ_b^0 \to Λ_c(2860)^+ \ell^- \barν_\ell$ and $Λ_b^0 \to Λ_c(2625)^+ \ell^- \barν_\ell$. Our predicted branching fraction for $Λ_b^0 \to Λ_c(2625)^+ \ell^- \barν_\ell$ is consistent with experimental data and other theoretical predictions, validating the reliability of our method. On this basis, we also present the branching fraction of $Λ_b^0 \to Λ_c(2860)^+ \ell^- \barν_\ell$. These results may serve as a theoretical reference for future experimental measurements of this decay channel. |
| title | Semileptonic decay of $Λ_b^0 \to Λ_c (2860)^+/Λ_c(2625)^+\ell^-\overlineν_\ell$ within QCD light-cone sum rules |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2605.23716 |