Prospects for perfect actions

被引:187
作者
Hasenfratz, P [1 ]
机构
[1] Univ Bern, Inst Theoret Phys, CH-3012 Bern, Switzerland
关键词
D O I
10.1016/S0920-5632(97)00696-8
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
The fixed-point (FP) action in QCD, although it is local and determined by classical equations, is difficult to parametrize well and is expensive to simulate. But the stake ij high: the FP action has scale invariant instanton solutions, has no topological artifacts, satisfies the index theorem on the lattice, does not allow exceptional configurations, requires no tuning to get the pion massless and is expected to reduce the cut-off effects significantly. An overview is given including a discussion on tests in Yang-Mills theory, QCD and d = 2 spill and gauge models.
引用
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页码:53 / 58
页数:6
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