Phys. Rev. D 62, 054506 (2000) [19 pages]Quenched QCD with O(a) improvement: The spectrum of light hadronsReceived 13 October 1999; published 28 July 2000 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 csw, 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. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.62.054506
DOI:
10.1103/PhysRevD.62.054506
PACS:
11.15.Ha, 12.38.Aw
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