Effects of dynamical sea-quarks on quark and gluon propagators
  We present an unquenched calculation of the quark propagator in Landau gauge with 2+1 flavors of dynamical quarks. We study the scaling behavior of the quark propagator in full QCD on two lattices with different lattice spacings and similar physical volume. We use configurations generated with an improved staggered (``Asqtad'') action by the MILC collaboration. 
Maria B. Parappilly, Patrick O.Bowman, Urs M. Heller, Derek B   Leinweber, Anthony G. Williams and J. B. Zhang