Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-23
Phys.Rev.D83:114002,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revised version accepted for publication in Phys. Rev. D. 10 pages and 3 figures
Scientific paper
10.1103/PhysRevD.83.114002
The thermodynamical properties of a pure Yang-Mills theory SU(N) is described by a gas of gluonic quasiparticles with temperature dependent mass $m(T)$ and a bag function $B(T).$ The analytic behavior of $m(T)$ and the pressure $p$ at high $T$ are derived and constraints on the parameters defining $B(T)$ are discussed. The trace anomaly $\theta=\rho-3p$ is evaluated in the high $T$ domain: it is dominated by a quadratic behavior $\theta =nKT^{2},$ where $n=2(N^{2}-1)$ is the number of degrees of freedom and $K$ is an integration constant which does not depend on the bag function $B(T)$. This is a general result which is in very good agreement with recent lattice simulations.
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