CP-PACS results for quenched QCD spectrum with the Wilson action

Abstract

We present progress report of a CP-PACS calculation of quenched QCD spectrum with the Wilson quark action. Light hadron masses and meson decay constants are obtained at $\beta =$5.9, 6.1, and 6.25 on lattices with a physical extent of 3 fm, and for the range of quark mass corresponding to $m_{\pi }/m_{\rho }\approx 0.75$ $-$ 0.4. Nucleon mass at each $\beta$ appears to be a convex function of quark mass, and consequently the value at the physical quark mass is much smaller than previously thought. Hadron masses extrapolated to the continuum limit exhibits a significant deviation from experimental values: with $K$ meson mass to fix strange quark mass, strange meson and baryon masses are systematically lower. Light quark masses determined from the axial Ward identity are shown to agree with those from perturbation theory in the continuum limit. Decay constants of mesons are also discussed.

arXiv comment12 pages, Latex(espcrc2,epsf), 17 ps figures. Talk presented by T.Yoshié at the International Workshop on ``LATTICE QCD ON PARALLEL COMPUTERS'', 10-15 March 1997, Center for Computational Physics, University of Tsukuba

References in corpus (2)

• Hadron Masses from the Valence Approximation to Lattice QCD
• Meson Decay Constants from the Valence Approximation to Lattice QCD

Cited by in corpus (9)

• Quenched Light Hadron Spectrum
• Light Hadron Spectrum and Quark Masses from Quenched Lattice QCD
• Nucleon Magnetic Moments Beyond the Perturbative Chiral Regime
• Maximal variance reduction for stochastic propagators with applications to the static quark spectrum
• Light and Strange Hadron Spectroscopy with Dynamical Wilson Fermions
• Comparative Study of full QCD Hadron Spectrum and Static Quark Potential with Improved Actions
• Continuum limit of lattice QCD with staggered quarks in the quenched approximation - a critical role for the chiral extrapolation
• Chiral symmetry
• The Hadronic Gas Chiral Phase Transition within Generalized Chiral Perturbation Theory