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Growing evidence indicates that in the continuum limit the rooted staggeredaction is in the correct QCD universality class, the non-local terms arisingfrom taste breaking can be viewed as lattice artifacts. In this paper weconsider the 2-flavor Asqtad staggered action at a lattice spacing ofapproximately 0.13 fm and probe the properties of the staggered configurationsby an overlap valence Dirac operator. By comparing the distribution of theoverlap eigenmodes to continuum QCD predictions we investigate if/when thelattice artifacts are small as a function of the staggered quark mass. Wedefine a matching overlap quark mass where the lattice corrections are minimalfor the topological susceptibility and from the eigenmode distribution wepredict the 2-flavor chiral condensate. Our results indicate that the staggeredconfigurations are consistent with 2-flavor continuum QCD up to small latticeartifacts, and predict a consistent value for the infinite volume chiralcondensate.Comment: 12 pages, 6 figures, REVTeX

Mixed action simulations on a staggered background: Interpretation and result for the 2-flavor QCD chiral condensate