Fluctuations and correlations in high temperature QCD

2015/07/16 by R. Bellwied, S. Borsanyi, Z. Fodor +4 · 1 citation
Physics and Astronomy · #hep-lat

paper · pdf · doi:10.1103/physrevd.92.114505

published as Phys. Rev. D 92, 114505 (2015) · 18 pages revtex, 13 figures

arxiv created 2015/07/16 · arxiv updated 2015/12/23

Abstract

We calculate second- and fourth-order cumulants of conserved charges in a temperature range stretching from the QCD transition region towards the realm of (resummed) perturbation theory. We perform lattice simulations with staggered quarks; the continuum extrapolation is based on N_t=10…24 in the crossover-region and N_t=8…16 at higher temperatures. We find that the Hadron Resonance Gas model predictions describe the lattice data rather well in the confined phase. At high temperatures (above ∼250 MeV) we find agreement with the three-loop Hard Thermal Loop results.

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