$Λ_b \to π^- (D_s^-) Λ_c(2595),~π^- (D_s^-) Λ_c(2625)$ decays and $DN,~D^*N$ molecular components

Abstract

From the perspective that the $Λ_c(2595)$ and $Λ_c(2625)$ are dynamically generated resonances from the $DN,~D^*N$ interaction and coupled channels, we have evaluated the rates for $Λ_b \to π^- Λ_c(2595)$ and $Λ_b \to π^- Λ_c(2625)$ up to a global unknown factor that allows us to calculate the ratio of rates and compare with experiment, where good agreement is found. Similarly, we can also make predictions for the ratio of rates of the, yet unknown, decays of $Λ_b \to D_s^- Λ_c(2595)$ and $Λ_b \to D_s^- Λ_c(2625)$ and make estimates for their individual branching fractions.

9 pages, 3 figures; V2: new references added