HEAVY-QUARK SELF-ENERGY IN NONRELATIVISTIC LATTICE QCD

被引：46

作者：

MORNINGSTAR, CJ

机构：

[1] Stanford Linear Accelerator Center, Stanford University, Stanford

来源：

PHYSICAL REVIEW D | 1993年 / 48卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.48.2265

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The heavy-quark self-energy in nonrelativistic lattice QCD is calculated to O(alpha(s)) in perturbation theory. The heavy-quark action includes all spin-independent relativistic corrections to order v2, where v is the typical heavy-quark velocity, and all spin-dependent corrections to order v4. The standard Wilson action and an improved multiplaquette action are used for the gluons. Results for the mass renormalization, wave function renormalization, and energy shift are given; tadpole contributions are found to be large. A tadpole improvement scheme in which all link variables are rescaled by a mean-field factor is also studied. The effectiveness of this scheme in offsetting the large tadpole contributions to the heavy-quark renormalization parameters is demonstrated.

引用

页码：2265 / 2278

页数：14

共 9 条

[1] RENORMALIZEABILITY OF MASSIVE NON-ABELIAN GAUGE FIELDS . A FUNCTIONAL INTEGRAL APPROACH [J].