Non-leptonic two-body weak decays of $\Lambda_c(2286)$

TL;DR

This paper analyzes non-leptonic two-body weak decays of the Lambda_c(2286) baryon using SU(3) flavor symmetry, providing precise predictions that mostly align with data but also highlight some discrepancies and accessible decay modes.

Contribution

The study applies SU(3) flavor symmetry to describe Lambda_c decays with higher precision and predicts new decay modes for experimental verification.

Findings

Most data reexamined by BESIII are well described.

Predicted branching ratio for Lambda_c+ to p pi0 exceeds experimental limit.

Several decay modes have predicted branching ratios accessible to experiments.

Abstract

We study the non-leptonic two-body weak decays of $\Lambda_c^+(2286)\to {\bf B}_n M$ with ${\bf B}_n$ ($M$) representing as the baryon (meson) states. Based on the $SU(3)$ flavor symmetry, we can describe most of the data reexamined by the BESIII Collaboration with higher precisions. However, our result of ${\cal B}(\Lambda_c^+ \to p\pi^0)=(5.6\pm 1.5)\times 10^{-4}$ is larger than the current experimental limit of $3\times10^{-4}$ (90\% C.L.) by BESIII. In addition, we find that ${\cal B}(\Lambda_c^+ \to \Sigma^+ K^0)=(8.0\pm 1.6)\times 10^{-4}$, ${\cal B}(\Lambda_c^+ \to \Sigma^+ \eta^\prime)=(1.0^{+1.6}_{-0.8})\times 10^{-2}$, and ${\cal B}(\Lambda_c^+ \to p \eta^\prime)=(12.2^{+14.3}_{-\,\,\,8.7})\times 10^{-4}$, which are accessible to the BESIII experiments.