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arXiv 2203.04458hep-phhep-ex
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通过$\Omega_c$的非轻子弱衰变探寻激发态$\Omega$重子

Toward discovering the excited $Ω$ baryons through nonleptonic weak decays of $Ω_c$

Kai-Lei Wang, Qi-Fang Lü, Ju-Jun Xie, Xian-Hui Zhong

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11 pages,4 figures
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AI总结：

本研究用组分夸克模型研究$\Omega_c$的非轻子弱衰变，解释了Belle实验的相关比值，预测了多种缺失激发态$\Omega$重子的产生率，指出其有望在Belle II或LHCb实验中通过该衰变被发现。

摘要：

本研究采用组分夸克模型，对$\Omega_c \to \Omega\pi^+/\Omega(1P)\pi^+/\Omega(1D)\pi^+/\Omega(2S)\pi^+$的非轻子弱衰变过程展开研究，预测$\Omega_c \to \Omega\pi^+$的分支比为$1.0\\%$。将新观测到的$\Omega(2012)$共振态视为自旋宇称$J^P=3/2^-$的常规1P波$\Omega$激发态时，Belle实验新测量的比值$\mathcal{B}[\Omega_c\to \Omega(2012)\pi^+ \to (\Xi\bar{K})^-\pi^+ ]/\mathcal{B}[\Omega_c\to \Omega\pi^+]$可得到很好的解释。此外，研究还探究了缺失的1P波态$\Omega(1^2P_{1/2^-})$、两个自旋四重态1D波态$\Omega(1^4D_{1/2^+})$与$\Omega(1^4D_{3/2^+})$，以及两个2S波态$\Omega(2^2S_{1/2^+})$和$\Omega(2^4S_{3/2^+})$的产生率。预计这些缺失的激发态$\Omega$重子，未来有望通过$\Omega_c$的非轻子弱衰变，在Belle II和/或LHCb的实验中被发现。

英文摘要：

The nonleptonic weak decay processes $Ω_c \to Ωπ^+/Ω(1P)π^+/Ω(1D)π^+/Ω(2S)π^+$ are studied using the constituent quark model. The branching fraction of $Ω_c \to Ωπ^+$ is predicted to be $1.0\%$. Considering the newly observed $Ω(2012)$ resonance as a conventional $1P$-wave $Ω$ excite state with spin-parity $J^P=3/2^-$, the newly measured ratio $\mathcal{B}[Ω_c\to Ω(2012)π^+ \to (Ξ\bar{K})^-π^+ ]/\mathcal{B}[Ω_c\to Ωπ^+]$ at Belle can be well understood. Besides, the production rates for the missing $1P-$wave state $Ω(1^2P_{1/2^-})$, two spin quartet $1D-$wave states $Ω(1^4D_{1/2^+})$ and $Ω(1^4D_{3/2^+})$, and two $2S$-wave states $Ω(2^2S_{1/2^+})$ and $Ω(2^4S_{3/2^+})$ are also investigated. It is expected that these missing excited $Ω$ baryons should have large potentials to be discovered through the nonleptonic weak decays of $Ω_c$ in forthcoming experiments by Belle II and/or LHCb.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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