Improved staggered quark actions with reduced flavor symmetry violations for lattice QCD

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

DOI:https://doi.org/10.1103/PhysRevD.59.014511· OSTI ID:289054

Lagaee, J; Sinclair, D K ^[1]

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1. HEP Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

We introduce a new class of actions for staggered quarks in lattice QCD which significantly reduce flavor symmetry violations in the pion mass spectrum. An action introduced by the MILC Collaboration for the same purpose is seen to be a special case. We discuss how such actions arise from a systematic attempt to reduce flavor symmetry violations in the weak coupling limit. It is shown that for quenched lattice QCD at 6/g{sup 2}=5.7, representative actions of this class give a considerable reduction in flavor symmetry violation over the standard staggered action, and a significant reduction over what is achieved by the MILC action. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 289054
• 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
QUANTUM CHROMODYNAMICS
FLAVOR
SYMMETRY BREAKING
PIONS
MASS