QCD spectrum with three quark flavors

Claude Bernard, Tom Burch, Kostas Orginos, William D Toussaint, Thomas A. DeGrand, Carleton DeTar, Saumen Datta, Steven Gottlieb, Urs M. Heller, Robert Sugar

Research output: Contribution to journalArticle

440 Citations (Scopus)

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
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume64
Issue number5
StatePublished - Sep 1 2001

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Quarks
Mesons
quantum chromodynamics
quarks
mesons
Spacing
spacing
Gauge
indication
Simulation
simulation
Decay
decay
Experiment

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Bernard, C., Burch, T., Orginos, K., Toussaint, W. D., DeGrand, T. A., DeTar, C., ... Sugar, R. (2001). QCD spectrum with three quark flavors. Physical Review D - Particles, Fields, Gravitation and Cosmology, 64(5), [054506].

QCD spectrum with three quark flavors. / Bernard, Claude; Burch, Tom; Orginos, Kostas; Toussaint, William D; DeGrand, Thomas A.; DeTar, Carleton; Datta, Saumen; Gottlieb, Steven; Heller, Urs M.; Sugar, Robert.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 64, No. 5, 054506, 01.09.2001.

Research output: Contribution to journalArticle

Bernard, C, Burch, T, Orginos, K, Toussaint, WD, DeGrand, TA, DeTar, C, Datta, S, Gottlieb, S, Heller, UM & Sugar, R 2001, 'QCD spectrum with three quark flavors', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 64, no. 5, 054506.
Bernard C, Burch T, Orginos K, Toussaint WD, DeGrand TA, DeTar C et al. QCD spectrum with three quark flavors. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2001 Sep 1;64(5). 054506.
Bernard, Claude ; Burch, Tom ; Orginos, Kostas ; Toussaint, William D ; DeGrand, Thomas A. ; DeTar, Carleton ; Datta, Saumen ; Gottlieb, Steven ; Heller, Urs M. ; Sugar, Robert. / QCD spectrum with three quark flavors. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2001 ; Vol. 64, No. 5.
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