QCD spectrum with three quark flavors

C. Bernard, T. Burch, K. Orginos, D. Toussaint, T. A. DeGrand, C. DeTar, S. Datta, S. Gottlieb, U. M. Heller, R. Sugar

Research output: Contribution to journalArticle

438 Scopus citations

Abstract

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 by-product 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.

Original languageEnglish (US)
Article number054506
Pages (from-to)545061-5450615
Number of pages4905555
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume64
Issue number5
StatePublished - Sep 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Bernard, C., Burch, T., Orginos, K., Toussaint, D., DeGrand, T. A., DeTar, C., Datta, S., Gottlieb, S., Heller, U. M., & Sugar, R. (2001). QCD spectrum with three quark flavors. Physical Review D - Particles, Fields, Gravitation and Cosmology, 64(5), 545061-5450615. [054506].