Phenomenology with Wilson fermions using smeared sources

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Physical Review D

OSTI ID:954324

Patel, Apoorva; Daniel, D; Kilcup, Gregory; Gupta, Rajan; Sharpe, Stephen

We investigate the use of two types of non-local ("smeared") sources for quark propagators in quenched lattice QCD at beta=6.0 using Wilson fermions at k=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.

• Research Organization: Thomas Jefferson Lab National Accelerator Facility
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 954324
• Report Number(s): CEBAF-TH-92-07
• Journal Information: Physical Review D, Journal Name: Physical Review D
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BARYONS
CONDENSATES
DECAY
DISTRIBUTION
EXTRAPOLATION
FERMIONS
HADRONS
MESONS
QUANTUM CHROMODYNAMICS
QUARKS
SPECTRA