Department

Data Science

Document Type

Article

Publication Title

Physical Review. D, Particles, Fields, Gravitation and Cosmology

ISSN

0556-2821

Volume

70

Issue

9

DOI

10.1103/PhysRevD.70.094505

First Page

1

Last Page

40

Publication Date

11-1-2004

Abstract

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 ≈ 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 possible effects of decays, or coupling to two-meson states in the 0++ and 1+meson propagators. A state consistent with π+K is seen as a “parity partner” in the Goldstone kaon propagator, and we make a preliminary mass computation for a radially excited 0 −meson.

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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