The observed charmed hadron $\Lambda_c(2940)^+$ and the $D^*N$ interaction

In this work, we systematically study the interaction of $D^*$ and nucleon, which is stimulated by the observation of $\Lambda_c(2940)^+$ close to the threshold of $D^*p$. Our numerical result obtained by the dynamical investigation indicates the existence of the $D^*N$ systems with $J^P=1/2^\pm,\,3/2^\pm$, which not only provides valuable information to understand the underlying structure of $\Lambda_c(2940)^+$ but also improves our knowledge of the interaction of $D^*$ and nucleon. Additionally, the bottom partners of the $D^*N$ systems are predicted, which might be as one of the tasks in LHCb experiment.