Improved staggered quark actions with reduced flavour symmetry violations for lattice QCD

Details Improved staggered quark actions with reduced flavour symmetry violations for lattice QCD Improved staggered quark actions with reduced flavour symmetry violations for lattice QCD

1998-06-14

arxiv.org/abs/hep-lat/9806014v1

Phys.Rev. D59 (1999) 014511

Physics

High Energy Physics

High Energy Physics - Lattice

RevTeX 18 pages with 3 postscript figures

Scientific paper

10.1103/PhysRevD.59.014511

We introduce a new class of actions for staggered quarks in lattice QCD which significantly reduce flavour symmetry violations in the pion mass spectrum. An action introduced by the MILC collaboration for the same purpose is seen to be a special case. We discus how such actions arise from a systematic attempt to reduce flavour symmetry violations in the weak coupling limit. It is shown that for quenched lattice QCD at 6/g^2=5.7, representative actions of this class give a considerable reduction in flavour symmetry violation over the standard staggered action, and a significant reduction over what is achieved by the MILC action.

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