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d∗(2380) in a chiral constituent quark model
Progress in Particle and Nuclear Physics ( IF 14.5 ) Pub Date : 2023-03-31 , DOI: 10.1016/j.ppnp.2023.104045
Yubing Dong , Pengnian Shen , Zongye Zhang

After a brief review of the experimental findings of d(2380) and several theoretical efforts to interpret its structure, the study of d(2380) on the quark–gluon degrees of freedom is presented in detail. On the basis of the SU(3) chiral constituent quark model and Resonating Group Method, the mass, width, wave function, and partial widths of almost all possible strong decays of the d(2380) state with the ΔΔ+C8C8 structure are evaluated. The obtained results agree with the data quite well, which implies that d(2380) could be assigned as a compact hexaquark system with the hidden-color component being dominant. The electromagnetic characteristics of d, such as the charge distribution, charge radius, multipole moment, and etc. are further calculated. Because of the sensitivity of these physical quantities to different interpretations of d, they can be used as additional physical quantities to distinguish the structures of d. Moreover, the production of d from the γd reaction, from the Υ(nS) decays in the e+e annihilations, and from the pp̄ annihilation at forthcoming P̄anda are also predicted and calculated. According to these predictions, experiments on Belle II, P̄anda, BEPC, and other large scientific facilities may be used to look for the d(2380) resonance and reveal its nature.



中文翻译:

d*(2380) 在手性成分夸克模型中

在对实验结果进行简要回顾后d(2380)以及一些解释其结构的理论努力,研究d(2380)详细介绍了夸克-胶子的自由度。的基础上小号ü(3个)手性成分夸克模型和共振群方法,质量、宽度、波函数和几乎所有可能的强衰变的部分宽度d(2380)状态与+C8个C8个结构进行评估。得到的结果与数据吻合得很好,这意味着d(2380)可以指定为紧凑的六夸克系统,其中隐藏颜色分量占主导地位。的电磁特性d,如电荷分布,电荷半径,多极矩等进一步计算。由于这些物理量对不同解释的敏感性d, 它们可以作为附加的物理量来区分结构d. 此外,生产d来自γd反应,从(n小号)衰减在电子+电子湮灭,并从pp̄即将毁灭P̄anda 也被预测和计算。根据这些预测,Belle II 上的实验,P̄anda、BEPC 和其他大型科学设施可用于寻找d(2380)共振并揭示其本质。

更新日期:2023-03-31
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