Variants of fattening and flavor symmetry restoration

Kostas Orginos, Doug Toussaint

Research output: Contribution to journalArticlepeer-review

343 Scopus citations


We study the effects of different “fat link” actions for Kogut-Susskind quarks on flavor symmetry breaking. Our method is mostly empirical—we compute the pion spectrum with different valence quark actions on common sets of sample lattices. Different actions are compared, as best we can, at equivalent physical points. We find significant reductions in flavor symmetry breaking relative to the conventional or to the “link plus staple” actions, with a reasonable cost in computer time. We also develop and test a scheme for approximate unitarization of the fat links. While our tests have concentrated on the valence quark action, our results will be useful in designing simulations with dynamical quarks.

Original languageEnglish (US)
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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