Continuum limit of lattice QCD with staggered quarks in the quenched approximation - a critical role for the chiral extrapolation

Abstract

We calculate the light quark spectrum of lattice QCD in the quenched approximation using Kogut-Susskind quarks. By combining results for different lattice spacings, several volumes and five quark masses, we are able to take the light quark mass, infinite volume, continuum limit. When we use non-linear chiral extrapolations, we find that the nucleon to rho mass ratio is 1.254 +- 0.018 +- 0.027, where the errors are statistical and systematic (within the quenched approximation), respectively. This should be compared with the experimental value of 1.22. Our results indicate that the error due to quenching is less than about 5%.

arXiv comment5 pages, 3 figures, LaTeX, uses REVTeX, epsf. Reference added; numerous changes and new table

References in corpus (17)

• Chiral Perturbation Theory for the Quenched Approximation of QCD
• Quenched Chiral Logarithms
• Quenched Chiral Perturbation Theory for Baryons
• Hadron Masses from the Valence Approximation to Lattice QCD
• Critical Analysis of Baryon Masses and Sigma-Terms in Heavy Baryon Chiral Perturbation Theory
• Hadron Mass Predictions of the Valence Approximation to Lattice QCD
• Hadron Spectrum with Wilson fermions
• Chiral Perturbation Theory and Weak Matrix Elements
• Quenched Chiral Perturbation Theory for Vector Mesons
• QCD Spectrum --- 1996
• Quenched Chiral Perturbation Theory for Baryons
• CP-PACS results for quenched QCD spectrum with the Wilson action
• Topics in Light Hadron Mass Spectrum in Quenched QCD
• Light hadron spectrum---MILC results with the Kogut-Susskind and Wilson actions
• Recent MILC spectrum results
• The continuum limit in the quenched approximation
• Towards the continuum limit with quenched staggered quarks

Cited by in corpus (18)

• The QCD spectrum with three quark flavors
• Signatures of Quark-Gluon-Plasma formation in high energy heavy-ion collisions: A critical review
• Quenched Light Hadron Spectrum
• Light Hadron Masses from Lattice QCD
• Quenched Lattice QCD with Domain Wall Fermions and the Chiral Limit
• A Lattice Study of the Nucleon Excited States with Domain Wall Fermions
• Light Hadron Spectrum and Quark Masses from Quenched Lattice QCD
• Scaling tests of the improved Kogut-Susskind quark action
• Quenched QCD with O(a) improvement: I. The spectrum of light hadrons
• Unquenched QCD simulation results
• Lattice regularization for chiral perturbation theory
• Form factors in lattice QCD
• Light Hadron Spectrum in Quenched Lattice QCD with Staggered Quarks
• Dynamical Generation of Elementary Fermion Mass: First Lattice Evidence
• Strangeness in Lattice QCD
• Hybrid meson decay from lattice QCD
• Hadron spectroscopy from lattice QCD
• Quark Loop Effects with an Improved Staggered Action