Binding Energies and Melting Temperatures of Heavy Hadrons in Quark-Gluon Plasma

Abstract

We analyze the static potential of a quark-antiquark pair at $T\ge T_c$, where $T_c$ is a temperature of a deconfinement phase transition in QCD. We discuss the possibility that the non-perturbative part of this potential can be studied through the modification of the correlation functions, which define the quadratic field correlators of the nonperturbative vaccuum fields. We use the non-perturbative quark-antiquark potential derived in this way and the screened one-gluon-exchange potential with $T$-dependent Debye screening mass to calculate $J/\psi$, ${\rm Y}$ and ${\Omega }_{bbb}$ binding energies and melting temperatures in the deconfined phase of the full 2-flavors QCD.

Comments: a slightly extended version of the talk delivered at "Quark Confinement and the Hadron Spectrum IX - QCHS IX" International Conference (30 August - 3 September 2010, Madrid, Spain), a reference added, minor comments added