论文标题
开放式魅力Tetraquark候选人：$ x_ {0}（2900）$ NOTE
An open charm tetraquark candidate: note on $X_{0}(2900)$
论文作者
论文摘要
由LHCB最近观察到$ b^{+} \ rightarrow d^{+} d^{+} d^{ - } k^{+} $进程的动机，在$ b^{+} \ rightArrow d^{+} k^{+} $过程中，这可能是一个很好的开放式charm $ ud ud \ ud ud \ ud ud \ bar { QCD和规则的规则。在技术中，研究了$ ud \ bar {c} \ bar {s} $ tetraquark state的四个使用$ j^{p} = 0^{+} $的插值电流的配置。最后，对于轴向矢量diquark-轴 - 轴矢量反qiquark配置和$ 2.75^{+0.15} {+0.24} _ { - 0.24}^clock for clace for calliquiriighie，计算为$ 2.76^{+0.16} _ { - 0.23}〜\ mbox {gev} $，用于轴向矢量diquark-轴 - 轴矢量反qiquark配置和$ 2.75^{+0.15^{+0.15} _ { - 0.24} _ { - 0.24}^gbober for stall配置，两者都与实验数据$ 2.866 \ pm0.007 \ pm0.002〜 \ mbox {gev} $ of $ x_ {0}（2900）$，鉴于不确定性。这些结果支持$ x_ {0}（2900）$可能是$ 0^{+} $ tetraquark State，带有开放式魅力风味。
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.
