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, D.
AU - Heller, U. M.
AU - Hetrick, J. E.
AU - Sugar, R.
N1 - Funding Information:
Computations for this work were performed at the San Diego Supercomputer Center (SDSC), the Pittsburgh Supercomputer Center (PSC), Oak Ridge National Laboratory (ORNL), the National Center for Supercomputing Applications (NCSA), the National Energy Resources Supercomputer Center (NERSC), the Albuquerque High Performance Computing Center, Indiana University, and the University of Arizona. We thank Takashi Kaneko for sharing results. This work was supported by the U.S. Department of Energy under Contract Nos. DOE-DE-FG02-91ER-40628, DOE-DE-FG02-91ER-40661, DOE-DE-FG02-97ER-41022, and DOE-DE-FG02-04ER-41298 and National Science Foundation Grant Nos. NSF-PHY99-70701 and NSF-PHY00-98395.
PY - 2004
Y1 - 2004
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 [Formula Presented] 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 [Formula Presented] and [Formula Presented] meson propagators. A state consistent with [Formula Presented] is seen as a “parity partner” in the Goldstone kaon propagator, and we make a preliminary mass computation for a radially excited [Formula Presented] 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 [Formula Presented] 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 [Formula Presented] and [Formula Presented] meson propagators. A state consistent with [Formula Presented] is seen as a “parity partner” in the Goldstone kaon propagator, and we make a preliminary mass computation for a radially excited [Formula Presented] 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
SN - 1550-7998
VL - 70
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 9
ER -