Topological susceptibility with the improved Asqtad action

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dc.creatorBernard, C.
dc.creatorDeGrand, T.
dc.creatorDeTar, C.
dc.creatorGottlieb, Steven
dc.creatorGregory, E.
dc.creatorHart, A.
dc.creatorHasenfratz, A.
dc.creatorHeller, Urs
dc.creatorHetrick, J.
dc.creatorOsborn, J.
dc.creatorSugar, R.
dc.creatorToussaint, D.
dc.date2003-08-18
dc.date2003-09-26
dc.date.accessioned2026-07-07T11:30:42Z
dc.date.available2026-07-07T11:30:42Z
dc.descriptionChiral perturbation theory predicts that in quantum chromodymamics light dynamical quarks suppress the topological (instanton) susceptibility. We investigate this suppression through direct numerical simulation using the Asqtad improved lattice fermion action. This action holds promise for carrying out nonperturbative simulations over a range of quark masses for which chiral perturbation theory is expected to converge. To test the effectiveness of the action in capturing instanton physics, we measure the topological susceptibility as a function of quark masses with 2+1 dynamical flavors. Our results, when extrapolated to zero lattice spacing, are consistent with predictions of leading order chiral perturbation theory. Included in our study is a comparison of three methods for analyzing the topological susceptibility: (1) the Boulder hypercubic blocking technique with the Boulder topological charge operator, (2) the more traditional Wilson cooling method with the twisted plaquette topological charge operator and (3) the improved cooling method of de Forcrand, Perez, and Stamatescu and their improved topological charge operator.
dc.description22 pp., 9 figs., submitted to Phys. Rev. D; rearranged text, updated references, reworded interpretation
dc.identifierhttps://arxiv.org/abs/hep-lat/0308019
dc.identifierhttp://arxiv.org/abs/hep-lat/0308019
dc.identifierPhys.Rev.D68:114501,2003
dc.identifierdoi:10.1103/PhysRevD.68.114501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197065
dc.subjectHigh Energy Physics - Lattice
dc.titleTopological susceptibility with the improved Asqtad action
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