由晶格上的Nambu-Bethe-Salpeter振幅计算夸克-反夸克势
Quark-anti-quark potentials from Nambu-Bethe-Salpeter amplitudes on lattice
摘要：
在猝灭格点量子色动力学中，从反q-q Nambu-Bethe-Salpeter（NBS）波函数出发，研究了有限夸克质量的夸克-反q-q势.利用最近发展起来的从格点量子色动力学导出核力的方法，我们从NBS波函数导出了反q-q势。我们计算了几种夸克质量的赝标和矢量通道中的反q-q NBS波函数。在两个通道中，每个夸克质量处的导出势都呈线性加库仑形式。我们还讨论了反q-q势的夸克质量和通道依赖性。
英文摘要：
Quark--anti-quark (anti-q-q) potentials with finite quark masses are studied from the anti-q-q Nambu-Bethe-Salpeter (NBS) wave functions in quenched lattice QCD. With the use of a method which has been recently developed in the derivation of nuclear forces from lattice QCD, we derive the anti-q-q potentials from the NBS wave functions. We calculate the anti-q-q NBS wave functions in pseudo-scalar and vector channels for several quark masses. The derived potentials at each quark mass in both channels show linear plus Coulomb form. We also discuss the quark-mass and channel dependence of the anti-q-q potentials.
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