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15 papers · 2 filters
Lattice Gauge Actions for Fixed Topology
XLF Collaboration, W. Bietenholz, K. Jansen +4
We test a set of lattice gauge actions for QCD that suppress small plaquette values and in this way also suppress transitions between topological sectors. This is well suited for s…
Scaling tests with dynamical overlap and rooted staggered fermions
Stephan Dürr, Christian Hoelbling
We present a scaling analysis in the 1-flavor Schwinger model with the full overlap and the rooted staggered determinant. In the latter case the chiral and continuum limit of the s…
Light hadron spectra and wave functions in quenched QCD with overlap quarks on a large lattice
Federico Berruto, Nicolas Garron, Christian Hoelbling +5
A simulation of quenched QCD with the overlap Dirac operator has been completed using 100 Wilson gauge configurations at beta=6 on an 18^3x64 lattice. We present results for meson…
Electroweak penguins and SUSY K^0-\bar K^0 mixing with Neuberger quarks
Federico Berruto, Nicolas Garron, Christian Hoelbling +5
We present results for Delta I=3/2 and Delta S=2 matrix elements relevant for CP violation in K->Pi Pi decays and for the K_S-K_L mass difference in the standard model and beyond.…
Testing a Topology Conserving Gauge Action in QCD
S. Shcheredin, W. Bietenholz, K. Jansen +3
We study lattice QCD with a gauge action, which suppresses small plaquette values. Thus the MC history is confined to a single topological sector over a significant time, while oth…
A comparative study of overlap and staggered fermions in QCD
S. Dürr, Ch. Hoelbling, U. Wenger
We perform a comparative study of the infrared properties of overlap and staggered fermions in QCD. We observe that the infrared spectrum of the APE/HYP improved staggered Dirac op…