arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.05041hep-phhep-exnucl-th
收藏

探讨$f_0(1370)$的亚结构

Probing the substructure of $f_0(1370)$

Amir H. Fariborz, Azizollah Azizi, Abdorreza Asrar

摘要:

在一个有效的非线性手征拉格朗日框架下,研究了$f_0(1370)$的子结构。调查进行的背景下,标量介子的全球图片中的标量介子之间的基础连接的重要性低于和高于1 GeV的认识和实施。这些联系是由于各种夸克-反夸克、四夸克和胶组分之间的混合,在理解标量介子的性质方面起着核心作用。首先在模型的14维参数空间上进行了迭代蒙特卡罗模拟,并在此参数空间上确定了与所有实验数据总体一致的点集(全局点集),确定了2GeV以下所有等单标量态的各种衰变宽度和衰变比。然后在每个全局集合内,研究了最接近$f_0(1370)$属性的子集。不同于其他的isosinglet状态,显示在每个全球集的变化范围内的属性,它被发现,有一个明确的信号$f_0(1370)$主要是一个夸克-反夸克态与大量的$s {\bar s}$组件,连同小残余的四夸克和胶水组件。

英文摘要:

Within an effective nonlinear chiral Lagrangian framework the substructure of $f_0(1370)$ is studied. The investigation is conducted in the context of a global picture of scalar mesons in which the importance of the underlying connections among scalar mesons below and above 1 GeV is recognized and implemented. These connections are due to the mixings among various quark-antiquarks, four-quarks and glue components and play a central role in understanding the properties of scalar mesons. Iterative Monte Carlo simulations are first performed on the 14-dimensional parameter space of the model and sets of points in this parameter space (the global sets) that give an overall agreement with all experimental data on mass spectrum, various decay widths and decay ratios of all isosinglet scalar states below 2 GeV are determined. Then within each global set, subsets that give closest agreement for the properties of $f_0(1370)$ are studied. Unlike the properties of other isosinglet states that show a range of variation within each global set, it is found that there is a clear signal for $f_0(1370)$ to be predominantly a quark-antiquark state with a substantial $s {\bar s}$ component, together with small remnants of four-quark and glue components.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑