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arXiv 0906.3934hep-phhep-ex
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$Λ_c^+$重子的$J^P$组态

$J^P$ Assignments of $Λ_c^+$ Baryons

Bing Chen, Deng-Xia Wang, Ailin Zhang

摘要:

在质量加载的通量管模型中,用“好”双夸克态研究了$Λ_c^{+}$重子。研究表明,所有的$Λ_c^{+}$重子候选人在2008年审查的粒子数据组(PDG)的质量加载通量管模型很好地描述。分配这些$Λ_c^{+}$候选者的量子数$J^P$。如果$Λ_c(2765)^{+}$是轨道激发的$Λ^+_c$,那么它很可能是$J^P={3\over 2}^+$。如果$Λ_c(2765)^+$是轨道激发的$Σ_c$,那么应该存在另一个质量为$\approx 2770$ MeV的$J^P={3\over 2}^+$ $Λ^+_c$。在该模型中,不存在现有文献中预测的$J^P={1\over 2}^+$ $Λ_c(\approx 2700)^+$。$Λ_c(2940)^{+}$很可能是具有$J^P={5\over 2}^-$的轨道激发重子。

英文摘要:

The "good" diquark is employed to study $Λ_c^{+}$ baryons within a mass loaded flux tube model. The study indicates that all $Λ_c^{+}$ baryons candidates in the 2008 review by the Particle Data Group (PDG) are well described in the mass loaded flux tube model. The quantum numbers $J^P$ of these $Λ_c^{+}$ candidates are assigned. If $Λ_c(2765)^{+}$ is an orbitally excited $Λ^+_c$, it is likely the $J^P={3\over 2}^+$ one. If $Λ_c(2765)^+$ is an orbitally excited $Σ_c$, there ought to be another $J^P={3\over 2}^+$ $Λ^+_c$ with mass $\approx 2770$ MeV. In the model, there exists no $J^P={1\over 2}^+$ $Λ_c(\approx 2700)^+$ predicted in existing literature. $Λ_c(2940)^{+}$ is very possible the orbitally excited baryon with $J^P={5\over 2}^-$.

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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