Polyakov loop correlators and cyclic Wilson loop from lattice QCD

We discuss color screening in 2+1 flavor QCD in terms of free energies of a static quark-antiquark pair.Thermal modifications of long distance correlations in quark-antiquark systems are studied in terms of static meson correlators.We calculate the Polyakov loop correlator, the colorsinglet Wilson line correlator in Coulomb gauge and the cyclic Wilson loop on lattices using the HISQ/Tree action and almost physical quark mases with N τ = 4, 6, 8, 10, 12.We present results in the continuum limit for temperatures up to T 650 MeV and discuss the linear divergence of the cyclic Wilson loop.