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Light hadrons with improved staggered quarks: approaching the continuum limit

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arxiv hep-lat/0402030 v1 pith:I3QTEYWI submitted 2004-02-24 hep-lat

C. Aubin , C. Bernard , C. DeTar , Steven Gottlieb , E.B. Gregory , U.M. Heller , J.E. Hetrick , J. Osborn
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R. Sugar D. Toussaint
This is my paper · ORCID
classification hep-lat
keywords latticequarksimulationsapproximatelycomputationseffectsexamineextended
verification ladder T0 review T1 audit T2 compute T3 formal
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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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