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arXiv 2008.07295hep-phhep-ex
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一个开粲四夸克候选:关于$X_{0}(2900)$的注记

An open charm tetraquark candidate: note on $X_{0}(2900)$

Jian-Rong Zhang

摘要:

由于LHCb最近在$B^{+}\rightarrow D^{+}D^{-}K^{+}$过程中观测到了奇异的$X_{0}(2900)$,这可能是一个很好的开魅$ud\bar{c}\bar{s}$四夸克候选者,我们试图通过QCD求和规则来研究它的可能性。在技术上,研究了$ud\bar{c}\bar{s}$四夸克态的四种$J^{P}=0^{+}$内插电流组态。最后计算了轴矢量双夸克-轴矢量反双夸克组态的质量为$2.76^{+0.16}_{-0.23}~\mbox{GeV}$,标量双夸克-标量反双夸克组态的质量为$2.75^{+0.15}_{-0.24}~\mbox{GeV}$,考虑到不确定性,这两个质量与$X_{0}(2900)$的实验数据$2.866\pm0.007\pm0.002~\mbox{GeV}$一致.这些结果支持$X_{0}(2900)$可能是具有开放魅力风味的$0^{+}$四夸克态。

英文摘要:

Motivated by the LHCb's very recent observation of exotic $X_{0}(2900)$ in the $B^{+}\rightarrow D^{+}D^{-}K^{+}$ process, for which could be a good open charm $ud\bar{c}\bar{s}$ tetraquark candidate, we endeavor to investigate its possibility by means of QCD sum rules. In technique, four configurations of interpolating currents with $J^{P}=0^{+}$ are studied for the $ud\bar{c}\bar{s}$ tetraquark state. In the end, mass values are calculated to be $2.76^{+0.16}_{-0.23}~\mbox{GeV}$ for the axial vector diquark-axial vector antidiquark configuration and $2.75^{+0.15}_{-0.24}~\mbox{GeV}$ for the scalar diquark-scalar antidiquark configuration, both of which are consistent with the experimental data $2.866\pm0.007\pm0.002~\mbox{GeV}$ of $X_{0}(2900)$ in view of the uncertainty. These results support that $X_{0}(2900)$ could be a $0^{+}$ tetraquark state with open charm flavor.

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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