Semileptonic decay of $\Lambda_b^0 \to \Lambda_c (2860)^+/\Lambda_c(2625)^+\ell^-\overline{\nu}_\ell$ within QCD light-cone sum rules
In this work, we calculate the transition form factors for the weak decays $\Lambda_b^0 \to \Lambda_c(2860)^+$ and $\Lambda_b^0 \to \Lambda_c(2625)^+$ using QCD light-cone sum rules, and compute the branching fractions of the corresponding semileptonic decays $\Lambda_b^0 \to \Lambda_c(2860)^+ \ell^- \bar{\nu}_\ell$ and $\Lambda_b^0 \to \Lambda_c(2625)^+ \ell^- \bar{\nu}_\ell$. Our predicted branching fraction for $\Lambda_b^0 \to \Lambda_c(2625)^+ \ell^- \bar{\nu}_\ell$ 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 $\Lambda_b^0 \to \Lambda_c(2860)^+ \ell^- \bar{\nu}_\ell$. These results may serve as a theoretical reference for future experimental measurements of this decay channel.