论文标题
在重光四夸克状态下解开不同的结构
Disentangling different structures in heavy-light four-quark states
论文作者
论文摘要
提议解释最近发现的重型四夸克状态的模型已经假设某些内部结构，即（抗）夸克成分分组为diquark/Antidiquark簇，重 - 中含量/轻膜簇（Hadrocharmonium）或重量轻中的梅森分子。我们根据Dyson-Schinginger和Bethe-Salpeter方程提出并使用一种方法，对四夸克状态有可能区分这些模型。我们研究了重度$ cq \ bar {q} \ bar {c} $和$ cc \ bar {q} \ bar {q} $四夸克状态，带有$ q = u，d，s $和量子数量$ i（j^{pc}） $ 1（0^+），0（1^+），1（1^+）$。我们用这些量子数确定基态的主要成分，并建议对相应的实验状态的候选物。最值得注意的是，我们发现在所有$ cq \ bar {q} \ bar {c} $状态下，强烈的重型梅森 - 梅森和可忽略不计的diquark-antidiquark组件，而对于$ cc \ bar {q} \ bar {q} \ bar {q} $ nates $ status diquarks存在。 $ i = 0 $ channels中的潜在警告是$ c \ bar {c} $组件的必要但昂贵的，它降级为将来的工作。
Models proposed to explain recently discovered heavy-light four-quark states already assume certain internal structures, i.e. the (anti)quark constituents are grouped into diquark/antidiquark clusters, heavy-meson/light-meson clusters (hadrocharmonium) or heavy-light meson molecules. We propose and use an approach to four-quark states based on Dyson-Schwinger and Bethe-Salpeter equations that has the potential to discriminate between these models. We study the masses of heavy-light $cq\bar{q}\bar{c}$ and $cc\bar{q}\bar{q}$ four-quark states with $q=u,d,s$ and quantum numbers $I(J^{PC})=0(1^{++}),1(1^{+-}),0(0^{++})$ and $1(0^+),0(1^+),1(1^+)$. We identify the dominant components of the ground states with these quantum numbers and suggest candidates for corresponding experimental states. Most notably, we find strong heavy-light meson-meson and negligible diquark-antidiquark components in all $cq\bar{q}\bar{c}$ states, whereas for $cc\bar{q}\bar{q}$ states diquarks are present. A potential caveat in the $I=0$ channels is the necessary but costly inclusion of $c\bar{c}$ components which is relegated to future work.
