Phenomenology with Wilson fermions using smeared sources

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.3130· OSTI ID:7258712

Daniel, D; Gupta, R ^[1]; Kilcup, G W ^[2]; Patel, A ^[3]; Sharpe, S R ^[4]

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1. T-8, MS-B285, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Physics Department, The Ohio State University, Columbus, Ohio 43210 (United States)
3. Supercomputer Education and Research Centre and Centre for Theoretical Studies, Indian Institute of Science, Bangalore 560012 (India)
4. Theory Group, Continuous Electron Beam Accelerator Facility, Newport News, Virginia 23606 (United States)

We investigate the use of two types of nonlocal ( smeared'') sources for quark propagators in quenched lattice QCD at {beta}=6.0 using Wilson fermions at {kappa}=0.154 and 0.155. We present results for the hadron mass spectrum, meson decay constants, quark masses, the chiral condensate, and the quark distribution amplitude of the pion. The use of smeared sources leads to a considerable improvement over previous results. We find a disturbing discrepancy between the baryon spectra obtained using Wuppertal and wall sources. We find good signals in the ratio of correlators used to calculate the quark mass and the chiral condensate and show that the extrapolation to the chiral limit is smooth.

• DOE Contract Number: FG06-91ER40614
• OSTI ID: 7258712
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:7; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120* -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662230 -- Quantum Chromodynamics-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHIRAL SYMMETRY
CORRELATION FUNCTIONS
DECAY
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
LATTICE FIELD THEORY
MASS SPECTRA
MATRIX ELEMENTS
MESONS
PARTICLE DECAY
PERTURBATION THEORY
PIONS
POSTULATED PARTICLES
PROPAGATOR
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
RENORMALIZATION
SELF-ENERGY
SPECTRA
SYMMETRY
WARD IDENTITY