Analysis of the excited Ω c states as the pentaquark states with QCD sum rules,Communications in Theoretical Physics

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Analysis of the excited Ω c states as the pentaquark states with QCD sum rules
Communications in Theoretical Physics ( IF 2.4 ) Pub Date : 2021-02-05 , DOI: 10.1088/1572-9494/abc7b1
Hui-Juan Wang _{1,

2} , Zun-Yan Di ₁ , Zhi-Gang Wang ₁

Affiliation

We construct both the scalar-diquark-scalar-diquark-antiquark type and axialvector-diquark-axialvector-diquark-antiquark type interpolating currents to study the charmed pentaquark states ${susc}\bar{u}$ with ${J}^{P}={\tfrac{1}{2}}^{\pm }$ . We employ the QCD sum rules to investigate the masses and pole residues of the charmed pentaquark states by taking into account the vacuum condensates up to dimension 13 in the operator product expansion. Our calculation results indicate that the scalar-diquark-scalar-diquark-antiquark type and axialvector-diquark-axialvector-diquark-antiquark type charmed pentaquark states ${susc}\bar{u}$ with ${J}^{P}={\tfrac{1}{2}}^{-}$ can be possible candidates of the excited Ω_c states observed in the LHCb collaboration.

中文翻译：

激发Ω分析_Ç状态为 $\ tfrac {1} {2}$ 具有QCD和规则的五夸克状态

我们构建了标量双夸克-标量双夸克-反夸克型和axialvector -双夸克- axialvector -双夸克-反夸克型插值电流来研究粲五夸克态都 ${susc} \ bar {u}$ 用 ${J} ^ {P} = {\ tfrac {1} {2}} ^ {\ pm}$ 。我们使用QCD求和规则，通过在操作员产品扩展中考虑到高达13维的真空冷凝物，来研究迷惑的五夸克态的质量和极残差。我们的计算结果表明，标量双夸克-标量双夸克-夸克型和axialvector-双夸克-axialvector-双夸克-夸克型着迷五夸克状态 ${susc} \ bar {u}$ 与 ${J} ^ {P} = {\ tfrac {1} {2}} ^ {-}$ 可激发Ω的可能的候选_Ç在LHCb的协作观察的状态。

更新日期：2021-02-05

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