Diagonal and off-diagonal quark number susceptibilities at high temperatures

TL;DR

This paper reports continuum-extrapolated lattice QCD results for quark number susceptibilities at high temperatures, showing good agreement with perturbative calculations and providing insights into quark-gluon plasma properties.

Contribution

It provides the first high-precision continuum results for fourth-order quark number susceptibilities in the 300-700 MeV range using 2+1 flavor lattice QCD.

Findings

Good agreement with perturbative calculations across the temperature range

First continuum results for fourth-order susceptibilities at high temperatures

Provides data relevant for understanding quark-gluon plasma properties

Abstract

We present continuum extrapolated lattice QCD results for up to fourth-order diagonal and off-diagonal quark number susceptibilities in the high temperature region of 300-700 MeV. Lattice QCD calculations are performed using 2+1 flavors of highly improved staggered quarks with nearly physical quark masses and at four different lattice spacings. Comparisons of our results with recent weak coupling perturbative calculations yield reasonably good agreements for the entire temperature range.