论文标题
稳定的双重四夸克：频谱和结构
Stable double-heavy tetraquarks: spectrum and structure
论文作者
论文摘要
在组成的夸克模型中研究了双重型四夸克的结合状态。在bb \ bar {u} \ bar {d}通道中找到了isospin和旋转parity i（j^p）= 0（1^+）的两个绑定状态。一个是由有色diquarks制成的深层结合和紧凑的，而另一个则是浅的，并以BB^*分子延伸。前者与晶格QCD结果非常吻合。通过将一个重夸克之一替换为更轻的夸克，可以看到结合能的系统下降。我们总共找到了十个约束国家。首次显示出与单个哈密顿量完全不同的天性的黑龙。
Bound states of double-heavy tetraquarks are studied in a constituent quark model. Two bound states are found for isospin and spin-parity I(J^P ) = 0(1^+) in the bb\bar{u}\bar{d} channel. One is deeply bound and compact made of colored diquarks, while the other is shallow and extended as a BB^* molecule. The former agrees well with lattice QCD results. A systematic decrease in the binding energy is seen by replacing one of the heavy quarks to a lighter one. Altogether we find ten bound states. It is shown for the first time that hadrons with totally different natures emerge from a single Hamiltonian.
