Quenched QCD withO(a)<mml:mn/>improvement: The spectrum of light hadrons

1999/10/31 by UKQCD Collaboration, K. C. Bowler, Joyce Garden +17
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevd.62.054506

published as Phys.Rev.D62:054506,2000 · 36 pages, 7 postscript figures, REVTEX; typo in Table XVIII corrected; extended discussion of finite-size effects in sections III and VII; version to appear in Phys. Rev. D

arxiv created 2000/03/06 · openalex publication_date 2000/07/28 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

We present a comprehensive study of the masses of pseudoscalar and vector mesons, as well as octet and decuplet baryons computed in O(a)-improved quenched lattice QCD. Results have been obtained using the nonperturbative definition of the improvement coefficient c_sw, and also its estimate in tadpole improved perturbation theory. We investigate effects of improvement on the incidence of exceptional configurations, mass splittings, and the parameter J. By combining the results obtained using nonperturbative and tadpole improvement in a simultaneous continuum extrapolation, we can compare our spectral data to experiment. We confirm earlier findings by the CP-PACS Collaboration that the quenched light hadron spectrum agrees with experiment at the 10% level.

Citations

• The light hadron mass spectrum with non-perturbatively O(a) improved Wilson fermions
• Chiral perturbation theory for the quenched approximation of QCD
• Scaling of nonperturbativelyO(a)<mml:mn/>-improved Wilson fermions: Hadron spectrum, quark masses, and decay constants
• Resolving exceptional configurations in quenched lattice QCD
• Effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD