Higher moments of charge fluctuations in QCD at high temperature

Details Higher moments of charge fluctuations in QCD at high temperature Higher moments of charge fluctuations in QCD at high temperature

2009-07-27

arxiv.org/abs/0907.4624v2

Nucl.Phys.A830:705c-708c,2009

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, 3 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee

Scientific paper

10.1016/j.nuclphysa.2009.10.117

We present lattice results for baryon number, strangeness and electric charge fluctuations as well as their correlations at finite temperature and vanishing chemical potentials, i.e. under conditions relevant for RHIC and LHC. We find that the fluctuations change rapidly at the transition temperature $T_c$ and approach the ideal quark gas limit already at approximately $1.5T_c$. This indicates that quarks are the relevant degrees of freedom that carry the quantum numbers of conserved charges at $T\geq 1.5T_c$. At low temperature, qualitative features of the lattice results are well described by a hadron resonance gas model.

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