Thermal ground state for pure SU(2) Yang-Mills thermodynamics
arXiv:0812.2898
Abstract
In this proceeding the emergence of a composite, adjoint-scalar field as an average over (trivial holonomy) calorons and anti-calorons is reviewed. This composite field acts as a background field to the dynamics of perturbative gluons, to which is coupled via an effective, gauge invariant Lagrangian valid for temperatures above the deconfinement phase transition. Moreover, also an Higgs mechanism is induced by the composite field: two gluons acquire a quasi-particle thermal mass. On the phenomenological side the composite field acts as a bag pressure which shows a linear dependence on the temperature. As a result the linear rise with temperature of the trace anomaly is obtained and is compared to recent lattice studies.
Based on the presentation given at Confinement8, 1-6 September 2008, Mainz, Germany. To appear in Proceedings of Science. 6 pages, 2 figures
References in corpus (7)
- The QCD Equation of State with almost Physical Quark Masses
- Fuzzy Bags and Wilson Lines
- Lattice QCD Calculation for the Physical Equation of State
- Quark Gluon Bags as Reggeons
- Thermal photon dispersion law and modified black-body spectra
- Linear growth of the trace anomaly in Yang-Mills thermodynamics
- Nonperturbative screening of the Landau pole