The Spectrum of tmLQCD with Quark and Link Smearing
  The effect of using smeared sink operators on the hadron spectrum is studied for quenched twisted mass lattice QCD with up, down, and strange quarks. Gaussian smearing is used for quark fields, and stout link smearing for gauge fields. Smeared correlators are found to be dominated by the ground state with a small contribution from excited states, leading to an improved determination of some ground state masses. 
Abdou M. Abdel-Rehim, Randy Lewis, Robert G. Petry, R. M. Woloshyn