Quasiparticle Model of Quark-Gluon Plasma at Imaginary Chemical Potential

TL;DR

This paper develops and tests a quasiparticle model of the quark-gluon plasma at imaginary chemical potential, comparing it with lattice QCD data to explore properties like quark density and phase boundaries, and discusses the effects of baryo-chemical potential dependent masses.

Contribution

It introduces a quasiparticle model tested against lattice QCD data at imaginary chemical potential, providing insights into non-zero baryon density effects.

Findings

Model agrees with lattice QCD data for imaginary chemical potential.

Baryo-chemical potential dependent masses influence phase transition predictions.

Analytic continuation links results at imaginary and real chemical potentials.

Abstract

A quasiparticle model of the quark-gluon plasma is compared with lattice QCD data for purely imaginary chemical potential. Net quark number density, susceptibility as well as the deconfinement border line in the phase diagram of strongly interacting matter are investigated. In addition, the impact of baryo-chemical potential dependent quasiparticle masses is discussed. This accomplishes a direct test of the model for non-zero baryon density. The found results are compared with lattice QCD data for real chemical potential by means of analytic continuation and with a different (independent) set of lattice QCD data at zero chemical potential.