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 language | English (US) |
|---|---|
| Article number | 094505 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 70 |
| Issue number | 9 |
| DOIs | |
| State | Published - Nov 2004 |
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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 journal › Article
}
TY - JOUR
T1 - Light hadrons with improved staggered quarks
T2 - Approaching the continuum limit
AU - Aubin, C.
AU - Bernard, C.
AU - DeTar, C.
AU - Osborn, J.
AU - Gottlieb, Steven
AU - Gregory, E. B.
AU - Toussaint, William D
AU - Heller, U. M.
AU - Hetrick, J. E.
AU - Sugar, R.
PY - 2004/11
Y1 - 2004/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=42749107105&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=42749107105&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.70.094505
DO - 10.1103/PhysRevD.70.094505
M3 - Article
AN - SCOPUS:42749107105
VL - 70
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 9
M1 - 094505
ER -