$Λ_c(2910)$ and $Λ_c(2940)$ as the conventional baryons dressed with the $D^*N$ channel

Abstract

In this work, we treat Λ c (2910) + and Λ c (2940) + as the conventional udc cores dressed with the D * N channel. We provide a possible interpretation to both Λ c (2910) + and Λ c (2940) + within the same framework. In the study, we consider not only the effects between the conventional triquark core and the D * N channel but also the D * N-D * N interactions. The mass of Λ c state with J P = 1/2 − is larger than that with J P = 3/2 − in this unquenched picture, which is very different from the prediction of the conventional quenched quark model. Based on the mass spectrum, the spin-parity of Λ c (2940) + is more likely to be 1/2 − while Λ c (2910) + prefers 3/2 − . We look forward to the future experiments can test our results with more precise experimental data.