Compact sssc(c)over-bar pentaquark states predicted by a quark model
Compact sssc(c)over-bar pentaquark states predicted by a quark model
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夸克模型预测的紧凑 sssc(c)over-bar 五夸克态
DOI：
10.1016/j.physletb.2019.135028
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发表时间：
2019
影响因子：
4.4
通讯作者：
Zong Hongshi
中科院分区：
文献类型：
--
作者：
Meng Qi;Hiyama Emiko;Can Kadir Utku;Gubler Philipp;Oka Makoto;Hosaka Atsushi;Zong Hongshi
在势夸克模型中预言了几种紧凑的s s c c <$五夸克共振态。哈密顿量是最好的一种，它很好地再现了低位粲强子和奇异强子的质量。利用高斯展开方法进行了全五体计算，并明确地考虑了重子-介子阈值。采用真实的标度方法，我们预测了四个尖锐的共振，J P= 1/2−（E= 5180 MeV，Γ= 20 MeV），5/2−（5645 MeV，30 MeV），5/2−（5670 MeV，50 MeV）和1/2+（5360 MeV，80 MeV）。这些都是目前最好的夸克模型中紧致五夸克共振态的候选者，需要通过实验或格点QCD计算来证实。
Several compact s s s c c¯ pentaquark resonances are predicted in a potential quark model. The Hamiltonian is the best available one, which reproduces the masses of the low-lying charmed and strange hadrons well. Full five-body calculations are carried out by the use of the Gaussian expansion method, and the relevant baryon-meson thresholds are taken into account explicitly. Employing the real scaling method, we predict four sharp resonances, J P= 1/2−(E= 5180 MeV, Γ= 20 MeV), 5/2−(5645 MeV, 30 MeV), 5/2−(5670 MeV, 50 MeV), and 1/2+(5360 MeV, 80 MeV). These are the candidates of compact pentaquark resonance states from the current best quark model, which should be confirmed either by experiments or lattice QCD calculations.