Thermodynamics of (2+1) flavor QGP in quasiparticle model

TL;DR

This paper presents a quasiparticle model that accurately fits lattice QCD thermodynamics data for (2+1) flavor quark-gluon plasma and extends predictions to non-zero chemical potential without additional parameters.

Contribution

The authors develop a one-parameter quasiparticle model that fits recent lattice QCD results and extends it to predict quark density at non-zero chemical potential.

Findings

Excellent fit to lattice thermodynamics data

Model extension predicts quark density at finite chemical potential

Single parameter adjustment relates to QCD scale

Abstract

Using our recently developed one parameter quasiparticle model, we analyze more recent (refined) results of (2+1) flavor QGP in lattice simulation of QCD by various groups \cite{f.1,k.1,u.1,d.1}. We got a remarkable good fit to lattice thermodynamics of Ref. Szabolcs Borsanyi {\it et al.}, [hep-lat/1007.2580v2] and reasonable good fit to Ref. A. Bazavov {\it it al.}, Phys. Rev. {\bf D80}, 014504 (2009) by adjusting single parameter of the model which may be related QCD scale parameter. Further we extend our model for above system with zero chemical potential to non-zero chemical potential and predict quark density without any new parameters which may be compared with future lattice data.