论文标题
异国情调的四夸克频道的格子调查
A lattice investigation of exotic tetraquark channels
论文作者
论文摘要
我们对许多渠道进行了$ N_F = 2+1 $晶格研究，在文献中，文献中存在有关存在强度稳定的轻度tetraquarks的文献中存在的索赔。我们没有证据表明任何如此深入的状态，超出$ j^p = 1^+$，$ i = 0 $ $ $ $ $ ud \ bar {b} \ bar {b} $和$ i = 1/2 $ $ $ $ $ $ ls \ bar {b} \ bar {b} \ bar {b} $ {b} $在早期的Lattice研究中已经确定。我们还描述了我们以前的晶格研究的许多系统改进，包括使用较大的$M_πl$更好地抑制可能的有限体积效应，采用扩展的水槽来更好地控制激发状态的污染，并扩大GEVP分析中使用的操作员数量。我们的结果还使我们能够排除几种现象学模型，这些模型预测了未发现这种结合的通道中明显的四夸克结合。
We perform an $n_f=2+1$ lattice study of a number of channels where past claims exist in the literature for the existence of strong-interaction-stable light-heavy tetraquarks. We find no evidence for any such deeply-bound states, beyond the $J^P=1^+$, $I=0$ $ud\bar{b}\bar{b}$ and $I=1/2$ $ls\bar{b}\bar{b}$ states already identified in earlier lattice studies. We also describe a number of systematic improvements to our previous lattice studies, including working with larger $m_πL$ to better suppress possible finite volume effects, employing extended sinks to better control excited-state contamination, and expanding the number of operators used in the GEVP analyses. Our results also allow us to rule out several phenomenological models which predict significant tetraquark binding in channels where no such binding is found.
