Quenched QCD with O(a) improvement: 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)

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: The spectrum of light hadrons. Physical Review D , 6205 (5).

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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.

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This is a Submitted version
This version's date is: 1/9/2000
This item is not peer reviewed

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https://repository.royalholloway.ac.uk/items/a3223607-33f3-39a2-3c52-3c3c3d4fc847/2/

Item TypeJournal Article
TitleQuenched QCD with O(a) improvement: The spectrum of light hadrons
AuthorsBowler, 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
Wittig, H
Uncontrolled KeywordsCHIRAL PERTURBATION-THEORY, IMPROVED LATTICE QCD, ONE-LOOP ORDER, WILSON FERMIONS, DECAY CONSTANTS, GLUEBALL MASSES, CONTINUUM-LIMIT, MATRIX-ELEMENTS, AXIAL CURRENT, QUARK MASSES
DepartmentsFaculty of Science\Computer Science

Identifiers

doihttp://dx.doi.org/10.1103/PhysRevD.62.054506

Deposited by Research Information System (atira) on 30-May-2012 in Royal Holloway Research Online.Last modified on 30-May-2012


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