Zero mode contribution in quarkonium correlators and in-medium   properties of heavy quarks
  We calculate the low energy contribution to quarkonium correlators in Euclidean time in lattice QCD. This contribution was found to give the dominant source of the temperature dependence of the correlators. We have found that the low energy contribution is well described by a quasi-particle model and have determined the effective temperature dependent heavy quark mass. 
Saumen Datta, Peter Petreczky