Doubly Cabibbo-suppressed (DCS) nonleptonic weak decays of antitriplet charmed baryons are studied systematically in this work. The factorizable and nonfactorizable contributions can be classified explicitly in the topological-diagram approach and treated separately. In particular, the evaluation of nonfactorizable terms is based on the pole model in conjunction with current algebra. All three types of relevant non-perturbative parameters contributing factorizable and nonfactorizable terms are estimated in the MIT bag model. Branching fractions of all the DCS decays are predicted to be of order $10^{-4}\sim 10^{-6}$. In particular, we find that the three modes $\Xi_c^+\to \Sigma^+ K^0, \Sigma^0 K^+$ and $\Xi_c^0\to \Sigma^- K^+$ are as large as $(1\sim 2)\times 10^{-4}$, which are the most promising DCS channels to be measured. We also point out that the two DCS modes $\Xi_c^+\to \Sigma^+ K^0$ and $\Xi_c^0\to \Sigma^0 K^0$ are possible to be distinguished from $\Xi_c^+\to \Sigma^+ K_S$ and $\Xi_c^0\to \Sigma^0 K_S$. The decay asymmetries for all the channels with a kaon in their final states are found to be large in magnitude and negative in sign.

中文翻译：

---

反三重子魅惑重子的双重卡比波抑制衰变

在这项工作中系统地研究了反三重态魅重子的双重卡比波抑制 (DCS) 非轻子弱衰变。可分解和不可分解的贡献可以在拓扑图方法中明确分类并分别处理。特别是，不可分解项的评估基于极点模型并结合当前代数。在 MIT 袋模型中估计了所有三种类型的相关非微扰参数对可分解和不可分解项的贡献。所有 DCS 衰减的分支分数预计为 $10^{-4}\sim 10^{-6}$。特别地，我们发现 $\Xi_c^+\to \Sigma^+ K^0, \Sigma^0 K^+$ 和 $\Xi_c^0\to \Sigma^- K^+$ 的三种模式为大为 $(1\sim 2)\times 10^{-4}$，这是最有希望测量的 DCS 通道。我们还指出，$\Xi_c^+\to \Sigma^+ K^0$ 和 $\Xi_c^0\to \Sigma^0 K^0$ 两种 DCS 模式有可能与 $\Xi_c^ 区分开来+\to \Sigma^+ K_S$ 和 $\Xi_c^0\to \Sigma^0 K_S$。发现具有最终状态的 kaon 的所有通道的衰减不对称性在幅度上很大且符号为负。