arXiv 2212.121362022-12-23hep-ph

1+ QCD求和规则中的XTZ状态

1+ XTZ States within QCD Sum Rules

R. M. Albuquerque, S. Narison, D. Rabetiarivony

备注：: To appear in the proceedings of the 25th High-Energy Physics International Conference in Quantum Chromodynamics (QCD 22)

摘要：

我们提出了改进的估计的耦合，质量和质量比的$X_Q, Z_Q$和$T_{QQ\bar q\bar q'}$状态使用（逆）QCD拉普拉斯求和规则（LSR），其比例${\cal R}$和双比（DRSR），在稳定性标准。我们的结论是，所观察到的$X_c(3872)$和$Z_c(3900)$是四摩尔态（叠加的准简并分子和四夸克态具有类似的电流耦合）与预测的质量：$M_{{\cal T}_{X_c}}=3876(44)$ MeV和$M_{{\cal T}_{Z_c}}=3900(42)$ MeV。我们还对不同的$T_{QQ\bar q\bar q'}$轴矢量态的四夸克性质做了广泛的分析。然后，结合${\cal R}$和DRSR，对观测态$X_c(3872)$进行了重新分析，得到了精确的预言：$M_{T_{cc}^{1^+}}$ =3886（6）MeV.扩展到美容部门，我们发现结果：$M_{{\cal T}_{Z_b}}=10579(99)$ MeV和$M_{X_b}=10545(131)$ MeV。最后，我们面对我们的组合LSR $\oplus$ DRSR结果与其他一些方法（晶格和夸克模型）。

英文摘要：

We present improved estimates of the couplings, masses and mass ratios of the $X_Q, Z_Q$ and $T_{QQ\bar q\bar q'}$ states using (inverse) QCD Laplace sum rules (LSR), their ratios ${\cal R}$ and double ratios (DRSR), within stability criteria. We conclude that the observed $X_c(3872)$ and $Z_c(3900)$ are tetramoles states (superposition of quasi-degenerated molecule and tetraquark states having similar couplings to the currents) with the predicted masses: $M_{{\cal T}_{X_c}}=3876(44)$ MeV and $M_{{\cal T}_{Z_c}}=3900(42)$ MeV. We also do an extensive analysis of the four-quark nature of different $T_{QQ\bar q\bar q'}$ axial-vector states. Then, combining ${\cal R}$ and DRSR, we reanalyze the observed state $X_c(3872)$ and we obtain a precise prediction of $M_{T_{cc}^{1^+}}$=3886(6) MeV. Extending to the beauty sector, we find the results: $M_{{\cal T}_{Z_b}}=10579(99)$ MeV and $M_{X_b}=10545(131)$ MeV. Finally, we confront our combined LSR $\oplus$ DRSR results with the ones from some other approaches (lattices and quark models).

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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英文摘要：

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