The QCD spectrum with three quark flavors

Details The QCD spectrum with three quark flavors The QCD spectrum with three quark flavors

2001-04-02

arxiv.org/abs/hep-lat/0104002v2

Phys.Rev.D64:054506,2001

Physics

High Energy Physics

High Energy Physics - Lattice

38 pages, 20 figures, uses epsf. 5/29/01 revision responds to referee's Comments, changes pion fits and tables, and corrects F

Scientific paper

10.1103/PhysRevD.64.054506

We present results from a lattice hadron spectrum calculation using three flavors of dynamical quarks - two light and one strange, and quenched simulations for comparison. These simulations were done using a one-loop Symanzik improved gauge action and an improved Kogut-Susskind quark action. The lattice spacings, and hence also the physical volumes, were tuned to be the same in all the runs to better expose differences due to flavor number. Lattice spacings were tuned using the static quark potential, so as a byproduct we obtain updated results for the effect of sea quarks on the static quark potential. We find indications that the full QCD meson spectrum is in better agreement with experiment than the quenched spectrum. For the 0++ (a0) meson we see a coupling to two pseudoscalar mesons, or a meson decay on the lattice.

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