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Title: Light hadron spectrum and decay constants in quenched lattice QCD

Abstract

We present results for light hadrons composed of both degenerate and nondegenerate quarks in quenched lattice QCD. We calculate masses and decay constants using 60 gauge configurations with an [ital O]([ital a])-improved fermion action at [beta]=6.2. Using the [rho] mass to set the scale we find hadron masses within two to three standard deviations of the experimental values (given in parentheses): [ital m][sub [ital K]][sup *]=868[sub [minus]8][sup +9] MeV (892 MeV), [ital m][sub [phi]]=970[sub [minus]10][sup +20] MeV (1020 MeV), [ital m][sub [ital N]]=820[sub [minus]60][sup +90] MeV (938 MeV), [ital m][sub [Delta]]=1300[sub [minus]100][sup +100] MeV (1232 MeV), and [ital m][sub [Omega]]=1650[sub [minus]50][sup +70] MeV (1672 MeV). Direct comparison with experiment for decay constants is obscured by uncertainty in current renormalizations. However, for ratios of decay constants we obtain [ital f][sub [ital K]]/[ital f][sub [pi]]=1.20[sub [minus]2][sup +3] (1.22) and [ital f][sub [phi]]/[ital f][sub [rho]]=1.13[sub [minus]3][sup +2] (1.22).

Authors:
; ; ;  [1]; ; ; ; ; ; ; ; ; ;  [2];  [3]
  1. (Physics Department, The University, Southampton SO9 5NH (United Kingdom))
  2. (Department of Physics, The University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom))
  3. (
Publication Date:
OSTI Identifier:
5433009
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 49:1; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HADRONS; MASS SPECTRA; PARTICLE DECAY; QUANTUM CHROMODYNAMICS; LATTICE FIELD THEORY; FLAVOR; SU-3 GROUPS; SYMMETRY BREAKING; DECAY; ELEMENTARY PARTICLES; FIELD THEORIES; LIE GROUPS; ORGANOLEPTIC PROPERTIES; QUANTUM FIELD THEORY; SPECTRA; SU GROUPS; SYMMETRY GROUPS; 662230* - Quantum Chromodynamics- (1992-); 662110 - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)

Citation Formats

Allton, C.R., Lellouch, L., Sachrajda, C.T., Wittig, H., Baxter, R.M., Booth, S.P., Bowler, K.C., Henty, D.S., Kenway, R.D., McNeile, C., Pendleton, B.J., Richards, D.G., Simone, J.N., Simpson, A.D., and UKQCD Collaboration). Light hadron spectrum and decay constants in quenched lattice QCD. United States: N. p., 1994. Web. doi:10.1103/PhysRevD.49.474.
Allton, C.R., Lellouch, L., Sachrajda, C.T., Wittig, H., Baxter, R.M., Booth, S.P., Bowler, K.C., Henty, D.S., Kenway, R.D., McNeile, C., Pendleton, B.J., Richards, D.G., Simone, J.N., Simpson, A.D., & UKQCD Collaboration). Light hadron spectrum and decay constants in quenched lattice QCD. United States. doi:10.1103/PhysRevD.49.474.
Allton, C.R., Lellouch, L., Sachrajda, C.T., Wittig, H., Baxter, R.M., Booth, S.P., Bowler, K.C., Henty, D.S., Kenway, R.D., McNeile, C., Pendleton, B.J., Richards, D.G., Simone, J.N., Simpson, A.D., and UKQCD Collaboration). Sat . "Light hadron spectrum and decay constants in quenched lattice QCD". United States. doi:10.1103/PhysRevD.49.474.
@article{osti_5433009,
title = {Light hadron spectrum and decay constants in quenched lattice QCD},
author = {Allton, C.R. and Lellouch, L. and Sachrajda, C.T. and Wittig, H. and Baxter, R.M. and Booth, S.P. and Bowler, K.C. and Henty, D.S. and Kenway, R.D. and McNeile, C. and Pendleton, B.J. and Richards, D.G. and Simone, J.N. and Simpson, A.D. and UKQCD Collaboration)},
abstractNote = {We present results for light hadrons composed of both degenerate and nondegenerate quarks in quenched lattice QCD. We calculate masses and decay constants using 60 gauge configurations with an [ital O]([ital a])-improved fermion action at [beta]=6.2. Using the [rho] mass to set the scale we find hadron masses within two to three standard deviations of the experimental values (given in parentheses): [ital m][sub [ital K]][sup *]=868[sub [minus]8][sup +9] MeV (892 MeV), [ital m][sub [phi]]=970[sub [minus]10][sup +20] MeV (1020 MeV), [ital m][sub [ital N]]=820[sub [minus]60][sup +90] MeV (938 MeV), [ital m][sub [Delta]]=1300[sub [minus]100][sup +100] MeV (1232 MeV), and [ital m][sub [Omega]]=1650[sub [minus]50][sup +70] MeV (1672 MeV). Direct comparison with experiment for decay constants is obscured by uncertainty in current renormalizations. However, for ratios of decay constants we obtain [ital f][sub [ital K]]/[ital f][sub [pi]]=1.20[sub [minus]2][sup +3] (1.22) and [ital f][sub [phi]]/[ital f][sub [rho]]=1.13[sub [minus]3][sup +2] (1.22).},
doi = {10.1103/PhysRevD.49.474},
journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 49:1,
place = {United States},
year = {1994},
month = {1}
}