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基于强子-夸克偶素模型和色磁相互作用口袋模型的奇异隐重味四夸克态质量谱

The Mass Spectra of the Strange Hidden Heavy-flavored Tetraquark Under the Hadro-quarkonium Model and the Chromomagentic Interaction Bag Model

  • 摘要: 基于强子-夸克偶素(Hadro-quarkonium, H-Q)模型和包含色磁相互作用(Chromomagentic interaction, CMI)的口袋模型分别计算了含有奇异夸克的隐重味四夸克系统q\barsQ\barQ和s\barsQ\barQ的质量谱。H-Q模型的计算结果表明,当重夸克偶素Q\barQ处于激发态时,奇异介子和Q\barQ之间的束缚能较大,可能会形成紧致结构,因此实验上可以通过Q\barQ激发态至基态的衰变过程来识别。另外,用CMI口袋带模型对q\barsQ\barQ和s\barsQ\barQ的质量谱进行讨论:q\barsQ\barQ的质量谱与实验上发现的 \rmZ_\rmcs^(4000)和 \rmZ_\rmcs^(4220)仅相差20 MeV左右;对s\barsQ\barQ的质量计算结果和部分的实验结果非常接近。据此支持含有奇异夸克的隐重味四夸克态可能具有更多的紧致结构。

     

    Abstract: The mass spectra of hidden heavy-flavored tetraquark systems with strange quarks, q\barsQ\barQ and s\barsQ\barQ, are calculated based on the Hadro-quarkonium (H-Q) model and the bag model that includes chromomagnetic interaction (CMI). The results from the H-Q model indicate that when the heavy quarkonium Q\barQ is in an excited state, the binding energy between the strange meson and Q\barQ is significant, potentially forming a compact structure. Therefore, it is possible to identify such structures experimentally through the decay process from the excited state of Q\barQ to the ground state. Additionally, we discuss the mass spectra of q\barsQ\barQ and s\barsQ\barQ using the CMI bag model: the mass spectrum of q\barsQ\barQ differs from the experimentally observed \rmZ_\rmcs^(4000) and \rmZ_\rmcs^(4220) by only about 20 MeV. The mass calculation results for s\barsQ\barQ are in good agreement with some experimental findings. Based on this, we support the idea that exotic tetraquark states with strange quarks may exhibit more compact structures.

     

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