Testing Topology Conserving Gauge Actions for Lattice QCD

Details Testing Topology Conserving Gauge Actions for Lattice QCD Testing Topology Conserving Gauge Actions for Lattice QCD

2005-09-29

arxiv.org/abs/hep-lat/0509170v1

PoS LAT2005 (2005) 283

Physics

High Energy Physics

High Energy Physics - Lattice

Talk presented at Lattice 2005 (Theoretical developments), 6 pages, 6 figures

Scientific paper

We explore gauge actions for lattice QCD, which are constructed such that the occurrence of small plaquette values is strongly suppressed. Such actions originate from the admissibility condition in order to conserve the topological charge. The suppression of small plaquette values is expected to be advantageous for numerical studies in the $\epsilon$-regime and also for simulations with dynamical quarks. Performing simulations at a lattice spacing of about 0.1 fm, we present numerical results for the static potential, the physical scale $r_0$, the stability of the topological charge history, the condition number of the kernel of the overlap operator and the acceptance rate against the step size in the local HMC algorithm.

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