论文标题
带有扰动校正的Instanton液体模型中的重夸克相关器
Heavy quark correlators in Instanton Liquid Model with perturbative corrections
论文作者
论文摘要
在目前的工作中，我们考虑了QCD真空的Instanton Liquid模型（ILM）框架中的Instanton背景，考虑了对重夸克相关因子的影响，还考虑了扰动的Gluon效应。对于单个重型夸克，这会导致由于直接的非扰动和ILM修改的扰动贡献而导致的质量转移。在重型夸克 - 易夸克（$ q \ bar {q} $）扇区中，我们获得了组成直接Instanton诱导部分的电势和一个胶合交换（OGE）扰动部分，该部分由于非驾驶动力学而在较大的距离上进行筛选。在与重夸克物理学相对应的感兴趣区域，OGE中的筛选效果可以通过Yukawa型电位很好地近似于动态产生的Gluon质量。 还讨论了当前研究对重夸克的现象学的可能含义。
In the present work we consider the influence on the heavy quark correlators due to the instanton background in the framework of instanton liquid model (ILM) of QCD vacuum by taking into account also the perturbative gluon effects. For a single heavy quark this leads to the mass shift due to the direct-instanton nonperturbative and ILM modified perturbative contributions, respectively. In the heavy quark-antiquark ($Q\bar{Q}$) sector we obtain the potential consisting the direct instanton induced part and the one-gluon exchange (OGE) perturbative part which is screened at large distances due to the nonperturbative dynamics. At the region of interest corresponding to the heavy quark physics the screening effect in OGE can be well approximated by a Yukawa-type potential in terms of the dynamically generated gluon mass. A possible implication of the present studies to the phenomenology of heavy quarkonium is also discussed.
