\begin{document}$ \Lambda_c $\end{document}baryons within the j-j coupling scheme in the framework of the quark pair creation model. The calculations indicate the following. (i) Taking the observed states \begin{document}$ \Lambda_c(2595)^+ $\end{document} and \begin{document}$ \Lambda_c(2625)^+ $\end{document} as the 1P-wave λ-mode states \begin{document}$ \Lambda_c|J^P=1/2^-,1\rangle_{\lambda} $\end{document} and \begin{document}$ \Lambda_c|J^P=3/2^-,1\rangle_{\lambda} $\end{document}, respectively, we can reproduce the experimental data well in theory. (ii) Combined with the measured mass and decay properties of \begin{document}$ \Lambda_c(2860)^+ $\end{document}, this excited state can be explained as the 1D-wave λ-mode state \begin{document}$ \Lambda_c|J^P=3/2^+,1\rangle_{\lambda\lambda} $\end{document}. (iii) The newly observed state \begin{document}$ \Lambda_c(2910)^+ $\end{document} may be assigned as one of the 1P-wave ρ-mode states \begin{document}$ \Lambda_c|J^P=3/2^-,2\rangle_{\rho} $\end{document} or \begin{document}$ \Lambda_c|J^P=5/2^-,2\rangle_{\rho} $\end{document}. Meanwhile, we notice that the partial decay width ratio between \begin{document}$ \Sigma_c\pi $\end{document} and \begin{document}$ \Sigma_c^*\pi $\end{document} for the two candidates is significantly different. Hence, experimental progress in this ratio measurement may elucidate the nature of \begin{document}$ \Lambda_c(2910)^+ $\end{document}. (iv) According to the properties of \begin{document}$ \Lambda_c(2765)^+ $\end{document}, we find that the 2S-wave λ-mode state \begin{document}$ \Lambda_{c1}|J^P=1/2^+,0\rangle_{\lambda} $\end{document} is a potential candidate. (v) The 2P-wave λ-mode state \begin{document}$ \Lambda_{c1}|J^P=3/2^-,1\rangle_{\lambda} $\end{document} is most likely to be a good assignment of the controversial state \begin{document}$ \Lambda_c(2940)^+ $\end{document}. Both the total decay width and partial decay ratio between \begin{document}$ pD^0 $\end{document} and \begin{document}$ \Sigma_c\pi $\end{document} are in good agreement with observations. (vi) In addition, for the missing \begin{document}$ \Lambda_c $\end{document} excitations, we obtain their strong decay properties and hope these are useful for future experimental exploration."> Possible explanations of the observed Λ<i><sub>c</sub></i> resonances -
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