$\Lambda_b \to \pi^- (D_s^-) \Lambda_c(2595),~\pi^- (D_s^-) \Lambda_c(2625)$ decays and $DN,~D^*N$ molecular components

TL;DR

This paper models certain baryon decays involving $ m \, ext{Lambda}_c$ resonances as molecular states from $DN$ and $D^*N$ interactions, successfully matching experimental ratios and predicting new decay rates.

Contribution

It introduces a molecular interpretation of $ m \, ext{Lambda}_c(2595)$ and $ m \, ext{Lambda}_c(2625)$ resonances and calculates decay ratios consistent with experiments, providing predictions for unmeasured decay modes.

Findings

Good agreement with experimental decay rate ratios.

Predictions for decay rates of unmeasured channels.

Support for the molecular nature of $ m \, ext{Lambda}_c$ resonances.

Abstract

From the perspective that the $\Lambda_c(2595)$ and $\Lambda_c(2625)$ are dynamically generated resonances from the $DN,~D^*N$ interaction and coupled channels, we have evaluated the rates for $\Lambda_b \to \pi^- \Lambda_c(2595)$ and $\Lambda_b \to \pi^- \Lambda_c(2625)$ 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 $\Lambda_b \to D_s^- \Lambda_c(2595)$ and $\Lambda_b \to D_s^- \Lambda_c(2625)$ and make estimates for their individual branching fractions.