论文标题
$ cc \ bar {b} \ bar {b} $的频谱，$ bc \ bar {c} \ bar {c} $和$ bc \ bar {b} \ bar {b}
Spectrum of $cc\bar{b}\bar{b}$, $bc\bar{c}\bar{c}$, and $bc\bar{b}\bar{b}$ Tetraquark States in the Dynamical Diquark Model
论文作者
论文摘要
动力学的diquark模型假设可以从彩色的diquarks形成外来的哈子。该模型主张了一个多夸克外来状态，该状态由紧凑型diquark $δ$和Antidiquark $ \barδ$组成，用于通过有限范围的gluonic场相互作用的四夸克。我们使用晶格上的数值计算的Born-Oppenheimer（BO）近似值和BO电位，我们研究$ S- $ wave $ cc \ cc \ bar {b} \ bar {b} \ {b} $，$ bc \ bc \ bar {c} \ bar {c} \ bar {c} $ {旋转。我们假设Colour-Antitriple diquark和Colour-Triplet抗原抗Quark形成了Tetraquark State。 $ cc \ bar {b} \ bar {b} $的基础状态的预测质谱比其相应的两个膜阈值低。该系统可能是约束状态的候选人。 $ bc \ bar {c} \ bar {c} $和$ bc \ bar {b} \ bar {b} $ tetraquark状态的质量高于相应的两元阈值。
The dynamical diquark model assumes that exotic hadrons can be formed from colored diquarks. This model asserts a multiquark exotic state composed of a compact diquark $δ$ and antidiquark $\barδ$ for a tetraquark interacting through a gluonic field of finite extent. Using Born-Oppenheimer (BO) approximation and BO potential calculated numerically on the lattice, we study mass spectra of $S-$wave $cc\bar{b}\bar{b}$, $bc\bar{c}\bar{c}$, and $bc\bar{b}\bar{b}$ tetraquark systems in the basis of diquark spins. We assume that colour-antitriple diquark and colour-triplet antidiquark form tetraquark state. The predicted mass spectrum for ground state of $cc\bar{b}\bar{b}$ is found to be lower then their corresponding two-meson thresholds. This system may be a candidate for bound state. Masses of $bc\bar{c}\bar{c}$ and $bc\bar{b}\bar{b}$ tetraquark states are found to be above than the corresponding two-meson thresholds.
