Light hadrons with improved staggered quarks: approaching the continuum limit

Details Light hadrons with improved staggered quarks: approaching the continuum limit Light hadrons with improved staggered quarks: approaching the continuum limit

2004-02-24

arxiv.org/abs/hep-lat/0402030v1

Phys.Rev.D70:094505,2004

Physics

High Energy Physics

High Energy Physics - Lattice

43 pages, 16 figures

Scientific paper

10.1103/PhysRevD.70.094505

We have extended our program of QCD simulations with an improved Kogut-Susskind quark action to a smaller lattice spacing, approximately 0.09 fm. Also, the simulations with a approximately 0.12 fm have been extended to smaller quark masses. In this paper we describe the new simulations and computations of the static quark potential and light hadron spectrum. These results give information about the remaining dependences on the lattice spacing. We examine the dependence of computed quantities on the spatial size of the lattice, on the numerical precision in the computations, and on the step size used in the numerical integrations. We examine the effects of autocorrelations in "simulation time" on the potential and spectrum. We see effects of decays, or coupling to two-meson states, in the 0++, 1+, and 0- meson propagators, and we make a preliminary mass computation for a radially excited 0- meson.

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