Quenched chiral artifacts for Wilson-Dirac fermions

Journal Article · Fri Jan 01 00:00:00 EST 1999 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.59.014507· OSTI ID:289053

Bardeen, W; Eichten, E ^[1]; Duncan, A ^[2]; Thacker, H ^[3]

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1. Fermilab, P.O. Box 500, Batavia, Illinois 60510 (United States)
2. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
3. Department of Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)

We examine artifacts associated with the chiral symmetry breaking induced through the use of Wilson-Dirac fermions in lattice Monte Carlo computations. For light quark masses, the conventional quenched theory cannot be defined using direct Monte Carlo methods due to the existence of nonintegrable poles in physical quantities. These poles are associated with the real eigenvalue spectrum of the Wilson-Dirac operator. We show how this singularity structure can be observed in the analysis of both QED in two dimensions and QCD in four dimensions. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 289053
• Journal Information: Physical Review, D, Vol. 59, Issue 1; Other Information: PBD: Jan 1999
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
LATTICE FIELD THEORY
CHIRAL SYMMETRY
SYMMETRY BREAKING
MONTE CARLO METHOD
QUANTUM ELECTRODYNAMICS
QUANTUM CHROMODYNAMICS
SINGULARITY
FERMIONS
GAUGE INVARIANCE