Lattice-based QCD equation of state at finite baryon density: Cluster Expansion Model

2018/07/16 by V. Vovchenko, J. Steinheimer, O. Philipsen +4 · 1 citation
Physics and Astronomy · #hep-lat #hep-ph #nucl-th

paper · pdf · doi:10.1016/j.nuclphysa.2018.10.068

4 pages, 3 figures. Contribution to the Quark Matter 2018 conference proceedings

arxiv created 2018/07/16 · arxiv updated 2019/02/20

Abstract

The QCD equation of state at finite baryon density is studied in the framework of a Cluster Expansion Model (CEM), which is based on the fugacity expansion of the net baryon density. The CEM uses the two leading Fourier coefficients, obtained from lattice simulations at imaginary μ_B, as the only model input and permits a closed analytic form. Excellent description of the available lattice data at both μ_B = 0 and at imaginary μ_B is obtained. We also demonstrate how the Fourier coefficients can be reconstructed from baryon number susceptibilities.

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