Light hadrons with improved staggered quarks: Approaching the continuum limit
| Autor: | James Edward Hetrick, Christopher Alan Aubin, Urs M. Heller, Carleton DeTar, Robert L. Sugar, James C. Osborn, Steven Gottlieb, Claude Bernard, D. Toussaint, Eric Brittain Gregory |
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| Rok vydání: | 2004 |
| Předmět: |
Quark
Physics Quantum chromodynamics Nuclear and High Energy Physics Particle physics Meson High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) Nuclear Theory High Energy Physics::Phenomenology Hadron FOS: Physical sciences Propagator Particle decay High Energy Physics - Lattice Pion Quantum mechanics High Energy Physics::Experiment Invariant mass |
| Zdroj: | Physical Review D. 70 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.70.094505 |
| Popis: | 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 approximately 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 effects of decays, or coupling to two-meson states, in the 0++, 1+, and 0- meson propagators, and we make a preliminary mass computation for a radially excited 0- meson. Comment: 43 pages, 16 figures |
| Databáze: | OpenAIRE |
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