Static quark-antiquark free energy and the running coupling at finite temperature

By O. Kaczmarek, F. Karsch, F. Zantow, P. Petreczky. 2004

167 citations recorded by the source corpus.

We analyze the free energy of a static quark-antiquark pair in quenched QCD at short and large distances. From this we deduce running couplings, g{sup 2} (r, T), and determine the length scale that separates at high temperature the short distance perturbative regime from the large distance nonperturbative regime in the QCD plasma phase. Ambiguities in the definition of a coupling beyond the perturbative regime are discussed in their relation to phenomenological considerations on heavy quark bound states in the quark gluon plasma. Our analysis suggests that it is more appropriate to characterize the nonperturbative properties of the QCD plasma phase close to T{sub c} in terms remnants of the confinement part of the QCD force rather than a strong Coulombic force.

View Paper: https://www.semanticscholar.org/paper/0a2063c04d261a7b91531a9eb8a454fe4ea3f2a3

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Citations in the corpus

Gauge/String Duality, Hot QCD and Heavy Ion Collisions (2011, background): “7/T in hot QCD with no dynamical quarks [230].”
Thermal bottomonium suppression at RHIC and LHC (2011, background): “4) in order to take into account higher-order corrections which have been measured in lattice simulations [64].”
Bulk viscosity of QCD matter near the critical temperature (2007, background): “In our calculation, we estimate it as the scale at which the lattice calculations of the running coupling [30] coincide with the perturbative expression.”