$X(2900)$的运动学尖点和共振解释
Kinematical Cusp and Resonance Interpretations of the $X(2900)$
摘要：
我们检查是否LHCb载体$ud\bar{c}\bar{s}$状态$X(2900)$可以被解释为从$\bar D^*K^*$和$\bar D_1 K^*$相互作用产生的运动学尖点效应。产生振幅被建模为一个三角形图与强子末态相互作用。Dalitz图投影的满意拟合被获得，其利用了生产图的奇异性而不需要$\bar{D}K$共振。如果末态相互作用强到足以产生共振，则会得到更好的拟合，尽管支持这种情况的证据并不确凿。
英文摘要：
We examine whether the LHCb vector $ud\bar{c}\bar{s}$ state $X(2900)$ can be interpreted as a kinematical cusp effect arising from $\bar D^*K^*$ and $\bar D_1 K^*$ interactions. The production amplitude is modelled as a triangle diagram with hadronic final state interactions. A satisfactory fit to the Dalitz plot projection is obtained that leverages the singularities of the production diagram without the need for $\bar{D}K$ resonances. A somewhat better fit is obtained if the final state interactions are strong enough to generate resonances, although the evidence in favour of this scenario is not conclusive.
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。
