Singlet Free Energies and Renormalized Polyakov Loop in full QCD
  We calculate the free energy of a static quark anti-quark pair and the renormalized Polyakov loop in 2+1- and 3- flavor QCD using $16^3 \times 4$ and $16^3 \times 6$ lattices and improved staggered p4 action. We also compare the renormalized Polyakov loop with the results of our earlier studies. 
K. Petrov (for RBC-Bielefeld collaboration)