$\varphi$ Meson As a Probe of QCD Equation of State

Abstract

In this work, we extract the QCD Equation of State (EoS) using experimental results of the $\varphi$ meson produced in nuclear collisions at AGS, SPS and RHIC energies. The data are confronted to simple thermodynamic expectations and lattice results. The experimental data indicate a first order phase transition, with a mixed phase stretching energy density between $\sim$ 1 and 3.2 GeV/$f{m}^3$.

Comments: 9 pages, 8 figures, Excited QCD 2009, Zakopane (Poland). To appear in Acta Physica Plonica B