Light hadrons with improved staggered quarks: Approaching the continuum limit

C. Aubin, C. Bernard, C. DeTar, J. Osborn, Steven Gottlieb, E. B. Gregory, William D Toussaint, U. M. Heller, J. E. Hetrick, R. Sugar

Research output: Contribution to journalArticle

331 Citations (Scopus)

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.

Original languageEnglish (US)
Article number094505
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume70
Issue number9
DOIs
StatePublished - Nov 2004

Fingerprint

Continuum Limit
hadrons
Quarks
Mesons
quarks
continuums
mesons
Propagator
Spacing
Simulation
simulation
spacing
propagation
numerical integration
Autocorrelation
Numerical integration
Parity
autocorrelation
parity
quantum chromodynamics

ASJC Scopus subject areas

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

Cite this

Light hadrons with improved staggered quarks : Approaching the continuum limit. / Aubin, C.; Bernard, C.; DeTar, C.; Osborn, J.; Gottlieb, Steven; Gregory, E. B.; Toussaint, William D; Heller, U. M.; Hetrick, J. E.; Sugar, R.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 70, No. 9, 094505, 11.2004.

Research output: Contribution to journalArticle

Aubin, C, Bernard, C, DeTar, C, Osborn, J, Gottlieb, S, Gregory, EB, Toussaint, WD, Heller, UM, Hetrick, JE & Sugar, R 2004, 'Light hadrons with improved staggered quarks: Approaching the continuum limit', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 70, no. 9, 094505. https://doi.org/10.1103/PhysRevD.70.094505
Aubin, C. ; Bernard, C. ; DeTar, C. ; Osborn, J. ; Gottlieb, Steven ; Gregory, E. B. ; Toussaint, William D ; Heller, U. M. ; Hetrick, J. E. ; Sugar, R. / Light hadrons with improved staggered quarks : Approaching the continuum limit. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2004 ; Vol. 70, No. 9.
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