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arXiv 2006.01042hep-phhep-lat
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手征夸克模型中具有$qqs\bar{Q}Q$组态的五夸克

Pentaquarks with the $qqs\bar{Q}Q$ configuration in the Chiral Quark Model

Qi Zhang, Bing-Ran He, Jia-Lun Ping

摘要:

在手征夸克模型的框架下,研究了由$qqs\bar{Q}Q$组态($q = u$或$d$,$Q=b$或$c$)组成的五夸克系统.在此基础上,通过精确的五体动力学计算预测了一系列重口味的束缚态。我们发现考虑色八重态结构总是比考虑色单重态结构提供更多的束缚能,并且越重的夸克阻碍越容易形成束缚态。我们认为$qqs\bar{b}b$组态是一个由三个夸克包围的紧凑的$\bar{b}b$对,而$qqs\bar{b}c$、$qqs\bar{c}b$和$qqs\bar{c}c$组态是分子态.

英文摘要:

We study the five-quark system composed of $qqs\bar{Q}Q$ configuration ($q = u$ or $d$, $Q=b$ or $c$), in the framework of the chiral quark model. In consequence, a series of bound states with heavy flavors are predicted by precise five-body dynamical calculations. We found that taking color-octet structure into consideration always provides more bounding energy than color-singlet structure, and the more heavier quark prevents, the easier to form the bound states. We suggest $qqs\bar{b}b$ configuration is a compact $\bar{b}b$-pair surrounded by three other quarks, while $qqs\bar{b}c$, $qqs\bar{c}b$ and $qqs\bar{c}c$ configurations are molecular states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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