Topological susceptibility with three flavors of staggered quarks

C. Aubin, C. Bernard, Brian Billeter, C. DeTar, Steven Gottlieb, E. B. Gregory, U. M. Heller, J. E. Hetrick, J. Osborn, R. L. Sugar, William D Toussaint

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

As one test of the validity of the staggered-fermion fourth-root determinant trick, we examine the suppression of the topological suspectibility of the QCD vacuum in the limit of small quark mass. The suppression is sensitive to the number of light sea quark flavors. Our study is done in the presence of 2+1 flavors of dynamical quarks in the improved staggered fermion formulation. Variance-reduction techniques provide better control of statistical errors. New results from staggered chiral perturbation theory account for taste-breaking effects in the low-quark mass behavior of the susceptibility, thereby reducing scaling violations from this source. Measurements over a range of quark masses at two lattice spacings permit a rough continuum extrapolation to remove the remaining lattice artifacts. The results are consistent with chiral perturbation theory with the correct flavor counting.

Original languageEnglish (US)
Pages (from-to)600-602
Number of pages3
JournalNuclear Physics B (Proceedings Supplements)
Volume140
Issue numberSPEC. ISS.
DOIs
StatePublished - Mar 2005

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quarks
magnetic permeability
perturbation theory
fermions
retarding
taste
determinants
artifacts
extrapolation
counting
quantum chromodynamics
spacing
continuums
formulations
scaling
vacuum

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Topological susceptibility with three flavors of staggered quarks. / Aubin, C.; Bernard, C.; Billeter, Brian; DeTar, C.; Gottlieb, Steven; Gregory, E. B.; Heller, U. M.; Hetrick, J. E.; Osborn, J.; Sugar, R. L.; Toussaint, William D.

In: Nuclear Physics B (Proceedings Supplements), Vol. 140, No. SPEC. ISS., 03.2005, p. 600-602.

Research output: Contribution to journalArticle

Aubin, C, Bernard, C, Billeter, B, DeTar, C, Gottlieb, S, Gregory, EB, Heller, UM, Hetrick, JE, Osborn, J, Sugar, RL & Toussaint, WD 2005, 'Topological susceptibility with three flavors of staggered quarks', Nuclear Physics B (Proceedings Supplements), vol. 140, no. SPEC. ISS., pp. 600-602. https://doi.org/10.1016/j.nuclphysbps.2004.11.344
Aubin C, Bernard C, Billeter B, DeTar C, Gottlieb S, Gregory EB et al. Topological susceptibility with three flavors of staggered quarks. Nuclear Physics B (Proceedings Supplements). 2005 Mar;140(SPEC. ISS.):600-602. https://doi.org/10.1016/j.nuclphysbps.2004.11.344
Aubin, C. ; Bernard, C. ; Billeter, Brian ; DeTar, C. ; Gottlieb, Steven ; Gregory, E. B. ; Heller, U. M. ; Hetrick, J. E. ; Osborn, J. ; Sugar, R. L. ; Toussaint, William D. / Topological susceptibility with three flavors of staggered quarks. In: Nuclear Physics B (Proceedings Supplements). 2005 ; Vol. 140, No. SPEC. ISS. pp. 600-602.
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AU - Billeter, Brian

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AU - Heller, U. M.

AU - Hetrick, J. E.

AU - Osborn, J.

AU - Sugar, R. L.

AU - Toussaint, William D

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