近日，盐城工学院的谭悦及其研究团队取得一项新进展。经过不懈努力，他们利用手性夸克模型揭示T_ss系统的动力学。相关研究成果已于2025年1月15日在《中国物理C》上发表。

在手征夸克模型框架下，该研究团队基于高斯展开法对T_ss的束缚态进行了系统研究。研究人员考虑了所有具有01⁺量子数的物理通道，包括分子结构和二夸克结构。此外，通过考虑二夸克与分子态之间的耦合，该研究的计算发现了一个束缚能为60 MeV的深束缚态，其主要由KK*组成。

利用³P₀模型，研究人员计算了KK*束缚态中K*的衰变宽度，该宽度近似为T_ss系统中束缚态的衰变宽度。这些结果表明，由于束缚能的影响，KK*中K*的衰变宽度比真空中K*的衰变宽度小约3 MeV。此外，研究人员还进行了共振态计算。他们采用实尺度变换方法搜索T_ss系统中可能的共振态。

由于[K*]₈[K*]₈构型中的强吸引力，研究人员在2.2至2.8 GeV附近发现了四个共振态，它们主要具有隐色结构。这些态的衰变宽度小于10 MeV。研究人员强烈建议实验上努力寻找他们计算所预测的T_ss系统中的共振态。

据悉，自LHCb发现T_cc以来，T_cc及其重味伙伴受到了广泛关注。然而，对其奇异伙伴T_ss的研究却在很大程度上被忽视了。

附：英文原文

Title: Dynamical study of T_ss systems using the chiral quark model

Author: Jiazheng Ji, Yuheng Xing, Xinxing Wu, Ning Xu, Yue Tan

Issue&Volume: 2025-01-15

Abstract: Since the discovery of Tcc by LHCb, there has been considerable interest in T_cc and its heavy-flavor partners. However, the study of its strange partner T_ss has been largely overlooked. Within the framework of the chiral quark model, we conducted a systematic study of the bound states of T_ss based on the Gaussian Expansion Method. We considered all physical channels with 01⁺, including molecular and diquark structures. Moreover, by considering the coupling between diquarks and molecular states, our calculations allowed us to identify a deep bound state with a bounding energy of 60 MeV primarily composed of KK*. Using the ³P₀ model, we calculated the decay width of K* within the KK* bound state, which is approximated as the decay width of the bound state in the Tss system. These results indicate that, owing to the effect of binding energy, the decay width of K* in KK* is approximately 3 MeV smaller than that of K* in vacuum. Additionally, resonance state calculations were performed. We used the real-scaling method to search for possible resonance states in the Tss sysytem. Because of the strong attraction in the [K*]₈[K*]₈ configuration, four resonance states were found in the vicinity of 2.22.8 GeV, predominantly featuring hidden-color structures. The decay widths of these states are less than 10 MeV. We strongly recommend experimental efforts to search for the resonance states in the T_ss system predicted by our calculations.

DOI: 10.1088/1674-1137/ad7c28

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/ad7c28