Effect of Improving the Lattice Gauge Action on QCD Topology

Details Effect of Improving the Lattice Gauge Action on QCD Topology Effect of Improving the Lattice Gauge Action on QCD Topology

1996-09-03

arxiv.org/abs/hep-lat/9609012v1

Nucl.Phys.Proc.Suppl. 53 (1997) 560-563

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, 4 figures, poster presented at LATTICE96(improvement)

Scientific paper

10.1016/S0920-5632(96)00718-9

We use lattice topology as a laboratory to compare the Wilson action (WA) with the Symanzik-Weisz (SW) action constructed from a combination of (1x1) and (1x2) Wilson loops, and the estimate of the renormalization trajectory (RT) from a renormalization group transformation (RGT) which also includes higher representations of the (1x1) loop. Topological charges are computed using the geometric (L\"uscher's) and plaquette methods on the uncooled lattice, and also by using cooling to remove ultraviolet artifacts. We show that as the action improves by approaching the RT, the topological charges for individual configurations computed using these three methods become more highly correlated, suggesting that artificial lattice renormalizations to the topological susceptibility can be suppressed by improving the action.

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