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A Heavy Quark-Antiquark Pair in Hot QCD

D. Antonov·S. Domdey·H. -J. Pirner
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Abstract

Thermodynamics of a heavy quark-antiquark pair in SU(3)-QCD is studied both below and above the deconfinement critical temperature $T_c$. In the quenched case, a model of the string passing through heavy valence gluons yields a correct estimate of $T_c$ and the critical behavior of the string tension below $T_c$. For two light flavors, entropy and internal energy below $T_c$ can be obtained from the partition function of heavy-light mesons and baryons. To calculate the free energy of the system above $T_c$, we apply second-order perturbation theory in the interaction of the quark-gluon plasma constituents with the static quark-antiquark pair. The results for the entropy and internal energy, obtained both below and above $T_c$, are compared with recent lattice data.

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D. Antonov, S. Domdey, H. -J. Pirner. 2007-03-21. A Heavy Quark-Antiquark Pair in Hot QCD. https://doi.org/10.1016/j.nuclphysa.2007.03.009

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