论文标题
相对论弗里德里奇 - 李QPC方案中的两极结构
Two-pole structures in a relativistic Friedrichs-Lee-QPC scheme
论文作者
论文摘要
在相对论的弗里德里希（Friedrichs-Lee）模型中展示了两极结构的一般外观，该模型与相对论的夸克对创建模型相结合。当$ q \ bar q $状态夫妇在$ s $ partial Wave中与开放式风味连续体状态时，可以找到这种两极结构。我们发现许多神秘状态，例如$ f_0（500）/σ$，$ k_0^*（700）/κ$，$ a_0（980）$，$ f_0（980）$，$ d_0^*（2300）$，$ d_ {s0}^（s0}^*（2317）$，以及$ x（2317）$，以及$ x（3872），以及$ x（3872）（3872）两极结构。此外，一个有趣的观察结果是，这种两极的结构将在单个通道近似中大约贡献180 $^\ Circ $相移的散射过程。这种相对论方案可能会提供更多有关对非$ q \ bar q $状态属性的理解的见解。还提出，这种两极结构可能是一个普遍的现象，值得从理论和实验角度研究。
A general appearance of two-pole structures is exhibited in a relativistic Friedrichs-Lee model combined with a relativistic quark pair creation model in a consistent manner. This kind of two-pole structure could be found when a $q\bar q$ state couples to the open-flavor continuum state in the $S$ partial wave. We found that many enigmatic states, such as $f_0(500)/σ$, $K_0^*(700)/κ$, $a_0(980)$, $f_0(980)$, $D_0^*(2300)$, $D_{s0}^*(2317)$, and $X(3872)$, together with another higher state for each, all result from this kind of two-pole structures. Furthermore, an interesting observation is that this kind of two-pole structure will contribute roughly a total of 180$^\circ$ phase shift for the scattering process in a single channel approximation. This relativistic scheme may provide more insights into the understanding of the properties of non-$q\bar q$ state. It is also suggested that such two-pole structure could be a common phenomenon which deserves studying both from theoretical and experimental perspectives.
