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arXiv 1901.04815hep-ph
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轻四夸克态候选者

Light tetraquark state candidates

Zhi-Gang Wang

摘要:

本文用QCD求和规则研究了轴矢量-双夸克-轴矢量-反双夸克型标量、轴矢量、张量和矢量$ss\bar{s}\bar{s}$四夸克态。轴矢量四夸克态的质量$m_{X}=2.08\pm0.12\,\rm{GeV}$与BESIII合作组的实验值$(2062.8 \pm 13.1 \pm 4.2) \,\rm{MeV}$非常吻合,并支持将新的$X$态指定为具有$J^{PC}=1^{+-}$的$ss\bar{s}\bar{s}$四夸克态.预测质量$m_{X}=3.08\pm0.11\,\rm{GeV}$不利于将$ϕ(2170)$或$Y(2175)$指定为新$X$状态的载体配偶体。作为副产品,我们得到了相应的$qq\bar{q}\bar{q}$四夸克态的质量。轻四夸克态位于$2\,\rm{GeV}$附近而不是$1\,\rm{GeV}$附近。

英文摘要:

In this article, we study the axialvector-diquark-axialvector-antidiquark type scalar, axialvector, tensor and vector $ss\bar{s}\bar{s}$ tetraquark states with the QCD sum rules. The predicted mass $m_{X}=2.08\pm0.12\,\rm{GeV}$ for the axialvector tetraquark state is in excellent agreement with the experimental value $(2062.8 \pm 13.1 \pm 4.2) \,\rm{MeV}$ from the BESIII collaboration and supports assigning the new $X$ state to be a $ss\bar{s}\bar{s}$ tetraquark state with $J^{PC}=1^{+-}$. The predicted mass $m_{X}=3.08\pm0.11\,\rm{GeV}$ disfavors assigning the $ϕ(2170)$ or $Y(2175)$ to be the vector partner of the new $X$ state. As a byproduct, we obtain the masses of the corresponding $qq\bar{q}\bar{q}$ tetraquark states. The light tetraquark states lie in the region about $2\,\rm{GeV}$ rather than $1\,\rm{GeV}$.

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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