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arXiv 1807.08520hep-ph
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用QCD求和规则分析矢量和轴矢量$QQ\bar{Q}\bar{Q}$四夸克态

Analysis of the vector and axialvector $QQ\bar{Q}\bar{Q}$ tetraquark states with QCD sum rules

Zhi-Gang Wang, Zun-Yan Di

摘要:

本文构造了轴矢量-双夸克-轴矢量-反双夸克型流,用QCD求和规则研究了矢量和轴矢量$QQ\bar{Q}\bar{Q}$四夸克态,得到了它们的质量$M_{Y(cc\bar{c}\bar{c},1^{+-})} =6.05\pm0.08\,\rm{GeV}$,$M_{Y(cc\bar{c}\bar{c},1^{--})} =6.11\pm0.08\,\rm{GeV}$,$M_{Y(bb\bar{b}\bar{b},1^{+-})} =18.84\pm0.09\,\rm{GeV}$,$M_{Y(bb\bar{b}\bar{b},1^{--})} =18.89\pm0.09\,\rm{GeV}$ .矢量四夸克态位于$40\,\rm{MeV}$之上,位于$0^{++}$、$1^{+-}$和$2^{++}$四夸克态的相应质心之上,这是矢量四夸克态由四个重夸克组成的典型特征.

英文摘要:

In this article, we construct the axialvector-diquark-axialvector-antidiquark type currents to study both the vector and axialvector $QQ\bar{Q}\bar{Q}$ tetraquark states with the QCD sum rules, and obtain the masses $M_{Y(cc\bar{c}\bar{c},1^{+-})} =6.05\pm0.08\,\rm{GeV}$, $M_{Y(cc\bar{c}\bar{c},1^{--})} =6.11\pm0.08\,\rm{GeV}$, $M_{Y(bb\bar{b}\bar{b},1^{+-})} =18.84\pm0.09\,\rm{GeV}$, $M_{Y(bb\bar{b}\bar{b},1^{--})} =18.89\pm0.09\,\rm{GeV}$. The vector tetraquark states lie $40\,\rm{MeV}$ above the corresponding centroids of the $0^{++}$, $1^{+-}$ and $2^{++}$ tetraquark states, which is a typical feature of the vector tetraquark states consist of four heavy quarks.

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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