论文标题
分析Y（4500）作为矢量分子状态
Analysis of the Y(4500) as the vector molecular state
论文作者
论文摘要
对介子的音缓参数的研究对于理解强相互作用和QCD真空的性质至关重要。研究这些特性的方法之一是QCD和规则法（QCDSR），该方法已广泛用于研究质量，衰减常数，形态因素，衰减宽度等传统和外来载体的性质。最近，Besiii合作发现了一个新粒子，其统计显着性大于8σ在E^+ E^ - nihihitation的隐藏链通道中，表示为Y（4500）。在这项研究中，我们在QCDSR的框架中研究了Y（4500）状态，假设该粒子是具有量子数J^PC = 1^（ - ）的分子状态。我们检查了两点相关函数，并考虑了OPE侧的非扰动贡献，以评估运算符10。我们计算Y（4500）态的质量和衰减常数，并获得与文献中结果一致的质量值。我们希望本文介绍的研究提供了建立隐藏链分子谱的新见解。
The study of hadronic parameters of mesons is of great importance for understanding the nature of strong interactions and QCD vacuum. One of the approaches to investigate these properties is the QCD Sum Rule Method (QCDSR), which has been extensively used for studying masses, decay constants, form factors, decay widths, and so on properties of both traditional and exotic hadrons. Recently BESIII collaboration discovered a new particle with a statistical significance greater than 8σ in the hidden-charm channel of the e^+ e^- annihilation, denoted as Y(4500). In this study, we investigate the Y(4500) state in the framework of the QCDSR, assuming this particle is a molecular state with quantum numbers J^PC=1^(--). We examined the two-point correlation function and we take into account non-perturbative contributions in OPE side evaluating up to operator dimension 10. We calculate the mass and decay constant of the Y(4500) state and obtain a mass value consistent with the results in the literature. We hope the studies presented in this paper provide new insights to establish the hidden-charm molecular spectrum.
