发表机构
Center for High Energy Physics, Peking University; School of Physics and Electronic Technology, Liaoning Normal University; Center for Theoretical and Experimental High Energy Physics, Liaoning Normal University; School of Physical Sciences, University of Chinese Academy of Sciences（北京大学高能物理中心; 辽宁师范大学物理与电子科技学院; 辽宁师范大学理论与实验高能物理中心; 中国科学院大学物理科学学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
通过衰变比率分析，将X(2370)的组分歧义转化为可检验的实验问题，区分紧致四夸克态、混合态与三胶子胶球。
AI 中文摘要
近期证据表明 $X(2370)$ 近似为味单态，这加强了其作为赝标量胶球候选粒子的地位。然而，味单态性本身并不能唯一确定其组分结构。利用计算的三赝标量衰变比率，我们发现当前数据倾向于味单态混合态，同时与三胶子胶球相容。更重要的是，我们识别出两个共振分辨比率，$a_0(1450)\pi/[K_0^*(1430)\bar K+\mathrm{c.c.}]$ 和 $\phi\phi/[b_1(1235)\rho]$，其预测的层级将紧致四夸克态、混合态和三胶子胶球实现置于参数分离的区域。这些可观测量将 $X(2370)$ 的组分歧义转化为可直接检验的实验问题。
英文摘要
As a unique form of matter composed entirely of gauge bosons, glueballs are an important low-energy prediction of QCD. After decades of searches, the BESIII Collaboration recently suggested that $X(2370)$ may contain a dominant glueball component, based largely on evidence that it is approximately a flavor singlet. Recognizing that flavor-singlet character does not uniquely identify a glueball, we perform a comprehensive analysis using available mass, flavor-singlet, and decay constraints. We find that three flavor-singlet configurations-hybrid meson, tetraquark state, and trigluon glueball-can satisfactorily reproduce the existing experimental data. Among these possibilities, the hybrid structure best describes the measured three-pseudoscalar decay ratios. To ultimately pin down the dominant structure of $X(2370)$, we propose measuring the decay-width ratios $a_0(1450)π/[K_0^*(1430)\bar K+\mathrm{c.c.}]$ and $ϕϕ/[b_1(1235)ρ]$, which can exclusively distinguish these three scenarios.
