Light hadron spectrum and decay constants in quenched lattice QCD

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.49.474· OSTI ID:5433009

Allton, C R; Lellouch, L; Sachrajda, C T; Wittig, H ^[1]; 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 ^[2]

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1. Physics Department, The University, Southampton SO9 5NH (United Kingdom)
2. Department of Physics, The University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)

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).

• OSTI ID: 5433009
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662110 -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
ELEMENTARY PARTICLES
FIELD THEORIES
FLAVOR
HADRONS
LATTICE FIELD THEORY
LIE GROUPS
MASS SPECTRA
ORGANOLEPTIC PROPERTIES
PARTICLE DECAY
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SPECTRA
SU GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS