https://doi.org/10.1140/epjc/s10052-011-1673-7
Regular Article - Theoretical Physics
Trace anomaly and quasi-particles in finite temperature SU(N) gauge theory
1
Dipartimento di Fisica, Università di Catania, and INFN Sezione di Catania, 95123, Catania, Italia
2
Department of Physics, Pennsylvania State University, Hazleton Campus, Hazleton, PA, 18202, USA
3
Fakultät für Physik, Universität Bielefeld, 33501, Bielefeld, Germany
* e-mail: satz@physik.uni-bielefeld.de
Received:
14
March
2011
Revised:
7
April
2011
Published online:
10
June
2011
We consider deconfined matter in SU(N) gauge theory as an ideal gas of transversely polarized quasi-particle modes having a temperature-dependent mass m(T). Just above the transition temperature, the mass is assumed to be determined by the critical behavior of the energy density and the screening length in the medium. At high temperature, it becomes proportional to T as the only remaining scale. The resulting (trace anomaly based) interaction measure Δ=(ϵ−3P)/T 4 and energy density are found to agree well with finite temperature SU(3) lattice calculations.
© Springer-Verlag / Società Italiana di Fisica, 2011
