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Quenched QCD with O(a) improvement: I. The spectrum of light hadrons

Bowler, K.C.; Boyle, P.; Garden, J.; Kenway, R.D.; Richards, D.G.; Rowland, P.A.; Ryan, S.M.; Simma, H.; Michael, C.; Shanahan, H.P. and Wittig, H. (2000) Quenched QCD with O(a) improvement: I. The spectrum of light hadrons. Physical Review D, 62 . Article Number: 054506. ISSN 1550-2368 (online); 1550-7998 (print)

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Official URL: http://link.aps.org.ezproxy.liv.ac.uk/abstract/PRD...

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 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.

Item Type:Article
Additional Information:LTH 464. arXiv Number: arXiv:hep-lat/9910022v3. Additional citation information: PHYSICAL REVIEW D, VOLUME 62, 054506; 0556-2821/2000/62(5)/054506(19). 19 pages. Published 28 July 2000. Issue: September 2000.
Uncontrolled Keywords:CHIRAL PERTURBATION-THEORY; IMPROVED LATTICE QCD; ONE-LOOP ORDER; WILSON FERMIONS; DECAY CONSTANTS; GLUEBALL MASSES; CONTINUUM-LIMIT; MATRIX-ELEMENTS; AXIAL CURRENT; QUARK MASSES
Subjects:Q Science > QC Physics
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences
DOI:10.1103/PhysRevD.62.054506
Publisher's Statement:©2000 The American Physical Society
Related URLs:
Refereed:Yes
Status:Published
ID Code:607
Deposited On:31 Oct 2008 14:41
Last Modified:20 Mar 2012 11:22

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