Two-loop QCD gauge coupling at high temperatures

By M. Laine, Y. Schröder. 2005

162 citations recorded by the source corpus.

We determine the 2-loop effective gauge coupling of QCD at high temperatures, defined as a matching coefficient appearing in the dimensionally reduced effective field theory. The result allows to improve on one of the classic non-perturbative probes for the convergence of the weak-coupling expansion at high temperatures, the comparison of full and effective theory determinations of an observable called the spatial string tension. We find surprisingly good agreement almost down to the critical temperature of the deconfinement phase transition. We also determine one new contribution of order (g6T4) to the pressure of hot QCD.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f17f7dc818df18250fd40e6606bc5ca1ec4f66a0

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In Nuclear and High Energy Physics

1. Kenji Fukushima
2. V. Skokov
3. M. Tassler
4. C. Fischer
5. M. Laine
6. Guy D. Moore
7. Owe Philipsen
8. Harvey B. Meyer

Citations in the corpus

• Polyakov loop modeling for hot QCD (2017, background): “rong coupling, and moreover, EQCD (that is a three-dimensional eective theory of hot QCD) demonstrated that at the transition temperature the coupling constant stays quite moderate, i.e. EQCD s ˇ0:3 [199]. Motivated by this and constrained by the fact that such a transitional thermodynamic region ca”
• Heavy Quark Thermalization in Classical Lattice Gauge Theory (2009, methodology): “In this limit the coupling has been computed up to 2-loop level [30]; for Nf = 3 the values are g 2 ∼ 3 .”