论文标题
Charmed Baryon $ω_c$的HADRONIC弱衰变
Hadronic weak decays of the charmed baryon $Ω_c$
论文作者
论文摘要
在这项工作中，在这项工作中会系统地研究了Charmed Baryon $ω_c$的两体性弱弱衰变，包括Cabibbo最喜欢的（CF），单独的Cabibbo抑制（SCS）和倍增Cabibbo抑制的（DCS）模式。为了估算不可侵蚀的贡献，我们在pole模型中使用$ p $ - 波幅度和当前代数的$ s $ - 波幅度振幅。在所有通道中，腐烂到baryon八位位和伪内膜中，$ω_c\ toξ^0 \ edibleline {k}^0 $是唯一允许的CF模式。预测的分支订单的分支$ 3.8 \％$和订单$ 0.50 $的大且正衰减的不对称性$ 0.50 $表明在不久的将来对此模式的测量是有希望的。通过纯粹的不可分割的贡献，SCS模式$ω_c\toλ^0 \ operline {k}^0 $和DCS模式$ω_c\toλ^0η$的分支分数分别为$ 0.8 \％$和$ 0.4 \％\％\％\％$。两种DCS模式$ω_c\toς^0η$和$ω_c\toλ^0π^0 $被建议用作新物理搜索其消失的SM背景的渠道。
Two-body hadronic weak decays of the charmed baryon $Ω_c$, including Cabibbo-favored (CF), singly Cabibbo-suppressed (SCS) and doubly Cabibbo-suppressed (DCS) modes, are studied systematically in this work. To estimate nonfactorizable contributions, we work in the pole model for the $P$-wave amplitudes and current algebra for the $S$-wave amplitudes. Among all the channels decaying into a baryon octet and a pseudoscalar meson, $Ω_c\to Ξ^0\overline{K}^0$ is the only allowed CF mode. The predicted branching fraction of order $3.8\%$ and large and positive decay asymmetry of order $0.50$ indicate that a measurement of this mode in the near future is promising. Proceeding through purely nonfactorizable contributions, the SCS mode $Ω_c\toΛ^0\overline{K}^0$ and DCS mode $Ω_c\toΛ^0 η$ are predicted to have branching fractions as large as $0.8\%$ and $0.4\%$, respectively. The two DCS modes $Ω_c\toΣ^0η$ and $Ω_c\toΛ^0π^0$ are suggested to serve as new physics searching channels for their vanishing SM background.
