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Analysis of the Pcs(4459) as the hidden-charm pentaquark state with QCD sum rules
International Journal of Modern Physics A ( IF 1.6 ) Pub Date : 2021-04-20 , DOI: 10.1142/s0217751x21500718
Zhi-Gang Wang 1
Affiliation  

In this paper, we study the scalar-diquark–scalar-diquark–antiquark-type udscc̄ pentaquark state with the QCD sum rules, the predicted mass MP = 4.47 ± 0.11GeV is in excellent agreement with the experimental data 4458.8 ± 2.91.1+4.7MeV from the LHCb collaboration, and supports assigning the Pcs(4459) to be the hidden-charm pentaquark state with the spin-parity JP = 1 2. We take into account the flavor SU(3) mass-breaking effect, and estimate the mass spectrum of the diquark–diquark–antiquark-type udscc̄ pentaquark states with the strangeness S = 1.

中文翻译:

用 QCD 和规则分析 Pcs(4459) 作为隐魅五夸克态

在本文中,我们研究标量-二夸克-标量-二夸克-反夸克型dsCC̄具有 QCD 和规则的五夸克状态,预测质量 = 4.47 ± 0.11锗钒与实验数据非常吻合4458.8 ± 2.9-1.1+4.7电子伏特来自 LHCb 合作,并支持分配Cs(4459)成为具有自旋奇偶性的隐魅五夸克状态Ĵ = 1 2-. 我们考虑到味道小号ü(3)质量破坏效应,并估计二夸克-二夸克-反夸克型的质谱dsCC̄奇异的五夸克状态小号 = -1.
更新日期:2021-04-20
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