arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1409.6459hep-lat
收藏

SU(3)格点Yang-Mills理论中拓扑电荷密度和赝标胶球质量的关联和定域性质

Correlation and localization properties of topological charge density and the pseudoscalar glueball mass in SU(3) lattice Yang-Mills theory

Abhishek Chowdhury, A. Harindranath, Jyotirmoy Maiti

摘要:

为了提取连续介质的性质,我们研究了SU(3)格点Yang-Mills理论中的拓扑电荷密度相关器(TCDC)和拓扑电荷密度的逆参与比(IPR)($q(x)$)。由于不存在{ \em陷阱问题},因此利用最近提出的开边界条件,可以在较小的晶格间距下计算观测量。另一方面,威尔逊流提供的参考能量尺度使我们能够研究它们的缩放行为,与以前提出的涂抹技术相比。在固定HYP拖尾水平下,不同晶格间距的TCDC行为显示出明显的标度违规。相比之下,在一个特定的威尔逊流动时间$t$的所有晶格间距的调查(除了最大的),TCDC数据显示在我们的统计不确定性的普遍行为。通过研究小流时间行为,研究了TCDC的连续性。我们还提取了赝标量胶球质量从TCDC,这似乎是不敏感的晶格间距(0.0345 fm $\leq a\leq$ 0.0667 fm),并同意使用各向异性晶格提取的值,在统计误差。进一步,我们通过IPR研究了$q(x)$的局域化性质,其连续行为可以通过Wilson流动时间的小值来探测,并观察到IPR随Wilson流动时间的减小而减小。在Wilson流动时间下对$q(x)$的详细研究表明,随着Wilson流动时间的减少,大幅度的正电荷和负电荷密度区域的接近度增加,并且电荷密度似乎更加离域,从而导致观察到的IPR行为。

英文摘要:

Towards the goal of extracting the continuum properties, we have studied the Topological Charge Density Correlator (TCDC) and the Inverse Participation Ratio (IPR) for the topological charge density ($q(x)$) in SU(3) Lattice Yang-Mills theory for relatively small lattice spacings including some smaller than those explored before. With the help of recently proposed open boundary condition, it is possible to compute observables at a smaller lattice spacing since {\em trapping problem} is absent. On the other hand, the reference energy scale provided by Wilson flow allows us to study their scaling behavior in contrast to previously proposed smearing techniques. The behavior of TCDC for different lattice spacings at a fixed HYP smearing level shows apparent scaling violations. In contrast, at a particular Wilson flow time $t$ for all the lattice spacings investigated (except the largest one), the TCDC data show universal behavior within our statistical uncertainties. The continuum properties of TCDC are studied by investigating the small flow time behavior. We have also extracted the pseudoscalar glueball mass from TCDC, which appears to be insensitive to the lattice spacings (0.0345 fm $\leq a\leq$ 0.0667 fm) and agrees with the value extracted using anisotropic lattices, within statistical errors. Further, we have studied the localization property of $q(x)$ through IPR whose continuum behavior can be probed through the small values of Wilson flow time and observed the decrease of IPR with decreasing Wilson flow time. A detailed study of $q(x)$ under Wilson flow time revealed that as Wilson flow time decreases, the proximity of the regions of positive and negative charge densities of large magnitudes increases, and the charge density appears to be more delocalized resulting in the observed behavior of IPR.

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。

↑