Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10725227 | Physics Letters B | 2007 | 6 Pages |
Abstract
We analyze the running gauge coupling at finite temperature for QCD, using the functional renormalization group. The running of the coupling is calculated for all scales and temperatures. At finite temperature, the coupling is governed by a fixed point of the 3-dimensional theory for scales smaller than the corresponding temperature. The running coupling can drive the quark sector to criticality, resulting in chiral symmetry breaking. Our results provide for a quantitative determination of the phase boundary in the plane of temperature and number of massless flavors. Using the experimental value of the coupling at the Ï mass scale as the only input parameter, we obtain, e.g., for Nf=3 massless flavors a critical temperature of Tcrâ148Â MeV in good agreement with lattice simulations.
Related Topics
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Authors
Jens Braun, Holger Gies,