高阶拉普拉斯求和规则的XYZ - SU3突变：总结
XYZ - SU3 Breakings from Laplace Sum Rule at Higher Orders: Summary
摘要：
本文回顾和总结了我们在文献[1]中基于QCD Laplace求和规则（LSR）在微扰（PT）理论的次-次-首阶（N2 LO）下得到的关于XYZ-SU 3破缺的一些结果，包括次-首阶（NLO）SU 3破缺修正和d<（6 - 8）维非微扰凝聚的首阶（LO）贡献。我们的结论是，观察到的X态是1^++和0^++分子态的良好候选者。我们发现，SU 3破碎是相对较小的质量（< 10（分别）。3)%）的魅力（resp.底部）通道，而它们对于耦合来说是大的（<20%）。与手征极限情况一样，耦合度下降得更快：1/m_b^3/2比HQET的1/m_b^1/2。我们的方法不能清楚地将某些分子态与具有相同量子数的四夸克态分开（在误差范围内）。
英文摘要：
This talk reviews and summarizes some of our results in [1] on XYZ- SU3 Breakings obtained from QCD Laplace Sum Rules (LSR) at next-to-next-leading order (N2LO) of perturbative (PT) theory and including next-to-leading order (NLO) SU3 breaking corrections and leading order (LO) contributions of dimensions d< (6 - 8) non-perturbative condensates. We conclude that the observed X states are good candidates for being 1^++ and 0^++ molecules states. We find that the SU3 breakings are relatively small for the masses (< 10 (resp. 3) %) for the charm (resp. bottom) channels while they are large (< 20 %) for the couplings. Like in the chiral limit case, the couplings decrease faster: 1/m_b^3/2 than 1/m_b^1/2 of HQET. Our approach cannot clearly separate ( within the errors ) some molecule states from the four-quark ones with the same quantum numbers.
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