Cross-correlators of conserved charges in QCD

Abstract

We present cross-correlators of QCD conserved charges at ${\mu }_B=0$ from lattice simulations and perform a Hadron Resonance Gas (HRG) model analysis to break down the hadronic contributions to these correlators. We construct a suitable hadronic proxy for the ratio $-{\chi }_{11}^{BS}/{\chi }_2^S$ and discuss the dependence on the chemical potential and experimental cuts. We then perform a comparison to preliminary STAR results and comment on a possible direct comparison of lattice and experiment.

Comments: 6 pages, 3 figures, contribution to the proceedings from the 18th International Conference on Strangeness in Quark Matter (SQM 2019)