论文标题
lattice-qcd启发夸克模型中的完全链和-bottom pentaquarks
Fully-charm and -bottom pentaquarks in a Lattice-QCD inspired quark model
论文作者
论文摘要
完全稳定和-bottom pentaquarks，\ emph { $ \ frac {5} {2}^ - $在Lattice-QCD启发的Quark型号中进行了研究，该模型已经成功地描述了最近宣布的完全稳定的Tetraquark候选人$ X（6900）$，并且还预测了其他几个完全重量的Tetraquarks。一种基于高斯扩展方法与复杂尺度范围方法相结合的强大计算技术，用于预测和区分上述五体系统的，绑定，共鸣和散射状态。全面考虑了Baryon-Meson和Diquark-Diquark-Diquark-Antiquark配置，以及它们所有可能的颜色通道。对于全链和 - 底部系统的每个自旋 - 元通道，都会获得窄的共振。此外，它们中的大多数似乎是紧凑的多Quarks，其波浪功能由隐藏的彩色baryon-meson或diquark-diquark-andiquark-antiquark结构或它们之间的耦合所控制。
The fully-charm and -bottom pentaquarks, \emph{i.e.} $cccc\bar{c}$ and $bbbb\bar{b}$, with spin-parity quantum numbers $J^P=\frac{1}{2}^-$, $\frac{3}{2}^-$ and $\frac{5}{2}^-$, are investigated within a Lattice-QCD inspired quark model, which has already successfully described the recently announced fully-charm tetraquark candidate $X(6900)$, and has also predicted several other fully-heavy tetraquarks. A powerful computational technique, based on the Gaussian expansion method combined with a complex-scaling range approach, is employed to predict, and distinguish, bound, resonance and scattering states of the mentioned five-body system. Both baryon-meson and diquark-diquark-antiquark configurations, along with all of their possible color channels are comprehensively considered. Narrow resonances are obtained in each spin-parity channel for the fully-charm and -bottom systems. Moreover, most of them seems to be compact multiquarks whose wave-functions are dominated by either hidden-color baryon-meson or diquark-diquark-antiquark structure, or by the coupling between them.
