在追求$X(5568)$和它迷人的伙伴
In the Pursuit of $X(5568)$ and its Charmed Partner
摘要：
最近由D $Ø$合作在具有窄结构的$B^0_sπ^{\pm}$通道中观察到第一个具有四种不同夸克味道的四夸克候选者$(u, d, s$和$ b)$，尚未被其他合作证实。需要进一步的独立实验来确认$X(5568)$状态或对其生产设定限制。虽然量子数还不十分清楚，但已有的结果表明它可能是一个轴矢量或标量态的候选者。在这项研究中，$X(5568)$共振假设为一个紧密结合的双夸克，与自旋宇称的$J^{P}=1^{+}$或$J^{PC}=0^{++}$的质量和极剩余的计算使用两点热SVZ求和规则技术，包括凝聚到6维。此外，还讨论了其在魅力领域的合作伙伴。对$X(5568)$及其配对物的热性质的研究可以为即将进行的CMS、LHCb和PANDA等实验提供有价值的线索和信息。
英文摘要：
The recent observation by the D$Ø$ collaboration of the first tetraquark candidate with four different quark flavors $(u, d, s$ and $ b)$ in the $B^0_sπ^{\pm}$ channel having a narrow structure, has still not been confirmed by other collaborations. Further independent experiments are required either to confirm the $X(5568)$ state or to set limits on its production. Though quantum numbers are not exactly clear, the results existing in the literature indicate that it is probably an axial-vector or scalar state candidate. In this study, mass and pole residue of the $X(5568)$ resonance assuming as a tightly bound diquark, with spin-parity both $J^{P}=1^{+}$ or $J^{PC}=0^{++}$ are calculated using two-point Thermal SVZ sum rules technique by including condensates up to dimension six. Moreover, its partner in the charm sector is also discussed. Investigations defining the thermal properties of $X(5568)$ and its charmed partner may provide valuable hints and information for the upcoming experiments such as CMS, LHCb and PANDA.
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