Higher moments of charge fluctuations in QCD at high temperature

Abstract

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 $T\ge 1.5T_c$. At low temperature, qualitative features of the lattice results are well described by a hadron resonance gas model.

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

References in corpus (3)

• The QCD Equation of State with almost Physical Quark Masses
• Equation of state and QCD transition at finite temperature
• The transition temperature in QCD

Cited by in corpus (6)

• QCD Phase Diagram: Phase Transition, Critical Point and Fluctuations
• Equilibrium Statistical-Thermal Models in High-Energy Physics
• Lattice QCD at finite temperature : present status
• Polyakov linear SU(3) sigma model: features of higher order moments in dense and thermal hadronic medium
• On the Higher Moments of Particle Multiplicity, Chemical Freeze-Out and QCD Critical Endpoint
• Chemical Freeze-Out and Higher Order Multiplicity Moments