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arXiv 1704.02583hep-phhep-ex
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LHCb发现的新的$Ω_c^0$重子是$1P$和$2S$态的成员

New $Ω_c^0$ baryons discovered by LHCb as the members of $1P$ and $2S$ states

Bing Chen, Xiang Liu

摘要:

受LHCb新观察到的$Ω_c^0$态的启发,我们通过分析质谱和衰变行为来解码它们的性质。我们的研究表明,五个狭义状态,即,$Ω_c(3000)^0$、$Ω_c(3050)^0$、$Ω_c(3066)^0$、$Ω_c(3090)^0$和$Ω_c(3119)^0$可以被分组为具有负奇偶性的$1P$状态。其中,$Ω_c(3000)^0$和$Ω_c(3090)^0$状态可以是$J^P=1/2^-$候选,而$Ω_c(3050)^0$和$Ω_c(3119)^0$被建议作为$J^P=3/2^-$状态。$Ω_c(3066)^0$可视为$J^P=5/2^-$状态。由于自旋宇称、电磁跃迁和可能的强子衰变通道$Ω_c^{(\ast)}π$还没有被测量到,所以对这些窄的$Ω_c^0$态的其他解释也是可能的。此外,我们讨论了广泛的结构$Ω_c(3188)^0$作为$2S$状态与$J^P=1/2^+$或$J^P=3/2^+$的可能性。在我们的方案中,$Ω_c(3119)^0$不能是$2S$候选。

英文摘要:

Inspired by the newly observed $Ω_c^0$ states at LHCb, we decode their properties by performing an analysis of mass spectrum and decay behavior. Our studies show that the five narrow states, i.e., $Ω_c(3000)^0$, $Ω_c(3050)^0$, $Ω_c(3066)^0$, $Ω_c(3090)^0$, and $Ω_c(3119)^0$, could be grouped into the $1P$ states with negative parity. Among them, the $Ω_c(3000)^0$ and $Ω_c(3090)^0$ states could be the $J^P=1/2^-$ candidates, while $Ω_c(3050)^0$ and $Ω_c(3119)^0$ are suggested as the $J^P=3/2^-$ states. $Ω_c(3066)^0$ could be regarded as a $J^P=5/2^-$ state. Since the the spin-parity, the electromagnetic transitions, and the possible hadronic decay channels $Ω_c^{(\ast)}π$ have not been measured yet, other explanations are also probable for these narrow $Ω_c^0$ states. Additionally, we discuss the possibility of the broad structure $Ω_c(3188)^0$ as a $2S$ state with $J^P=1/2^+$ or $J^P=3/2^+$. In our scheme, $Ω_c(3119)^0$ cannot be a $2S$ candidate.

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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