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

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.

Note:

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

QCD equation of state
finite baryon density
cluster expansion model
baryon: density
quantum chromodynamics: equation of state
thermodynamics
expansion: cluster
baryon number: susceptibility
lattice field theory
numerical calculations

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