Progress on perfect lattice actions for QCD

被引：65

作者：

Bietenholz, W ^{[1
]}

Brower, R ^{[1
]}

Chandrasekharan, S ^{[1
]}

Wiese, UJ ^{[1
]}

机构：

[1] BOSTON UNIV, DEPT PHYS, BOSTON, MA 02215 USA

来源：

NUCLEAR PHYSICS B | 1997年

关键词：

D O I：

10.1016/S0920-5632(96)00818-3

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We describe a number of aspects in our attempt to construct an approximately perfect lattice action for QCD. Free quarks are made optimally local on the whole renormalized trajectory and their couplings are then truncated by imposing 3-periodicity. The spectra of these short ranged fermions are excellent approximations to continuum spectra. The same is true for free gluons. We evaluate the corresponding perfect quark-gluon vertex function, identifying in particular the ''perfect clover term''. First simulations for heavy quarks show that the mass is strongly renormalized, but again the renormalized theory agrees very well with continuum physics. Furthermore we describe the multigrid formulation for the non-perturbative perfect action and we present the concept of an exactly (quantum) perfect topological charge on the lattice.

引用

页码：921 / 934

页数：14

共 24 条

[1] The D234 action for light quarks [J].