Revisiting heavy-flavor conserving weak decays of charmed baryons within the nonrelativistic quark model

TL;DR

This paper studies weak decays of charmed baryons conserving heavy flavor using a nonrelativistic quark model, providing predictions for branching ratios that align with experimental data and can be tested in future experiments.

Contribution

It introduces a detailed nonrelativistic quark model approach to heavy-flavor conserving decays, incorporating baryon wave functions and mixing angles to match experimental results.

Findings

Effective reproduction of experimental data with specific mixing angles.

Predicted branching ratios for key decay processes.

Framework applicable for future experimental tests.

Abstract

In this work, we investigate the heavy-flavor conserving weak decays of charmed baryons, specifically the processes $\Xi_{c} \to \Lambda_{c} \pi$ and $\Omega_{c} \to \Xi_{c} \pi$, where the pole model is employed to account for the nonfactorizable contributions. Additionally, the nonperturbative parameters involved are determined within the framework of the nonrelativistic quark model, utilizing exact baryon wave functions obtained by solving the Schr\"{o}dinger equation with a nonrelativistic potential. By considering the mixing angle $\theta \in (24.4^\circ, 32.4^\circ)$ for $\Xi_{c}-\Xi_{c}^{\prime}$ mixing, we find that the experimental data can be effectively reproduced. Furthermore, we estimate the branching ratios: $\mathcal{B}(\Xi_{c}^{+} \to \Lambda_{c}^{+} \pi^{0}) = (8.69 \sim 9.79) \times 10^{-3}$, $\mathcal{B}(\Omega_{c}^{0} \to \Xi_{c}^{+} \pi^{-}) = (11.3 \sim 12.1) \times 10^{-3}$, and $\mathcal{B}(\Omega_{c}^{0} \to \Xi_{c}^{+} \pi^{0}) = (4.67 \sim 5.23) \times 10^{-3}$. These predictions can be tested in ongoing experiments at LHCb, Belle II, and BESIII.