Motivated by the very recent discovery of fully open-flavor exotic states X ₀(2900) and X ₁(2900) by the LHCb collaboration [1], we study possible interpretations of these exotic states by QCD sum rules method. We have calculated mass and decay constant by traditional QCD sum rules analysis and Monte-Carlo based analysis. X ₀(2900) and X ₁(2900) are studied in molecular and diquark–antidiquark tetraquark pictures, respectively. Obtained mass results agree well with the masses observed in the experiment. We also made a Monte-Carlo based analysis within QCD sum rules for the mass and decay constant distributions to investigate the possible assignments for the structures of X ₀(2900) and X ₁(2900).

受LHCb 合作 [1]最近发现完全开放风味的奇异状态X ₀ (2900) 和X ₁ (2900) 的启发，我们通过 QCD 和规则方法研究了这些奇异状态的可能解释。我们通过传统的 QCD 和规则分析和基于蒙特卡罗的分析计算了质量和衰减常数。X ₀ (2900) 和X ₁ (2900) 分别在分子和双夸克-反双夸克四夸克图片中进行研究。获得的质量结果与实验中观察到的质量非常吻合。我们还在质量和衰减常数分布的 QCD 和规则中进行了基于蒙特卡罗的分析，以研究X结构的可能分配 ₀ (2900) 和X ₁ (2900)。