Strangeness neutral equation of state for QCD with a critical point

2021/03/15 by Jamie M. Stafford, Débora Mroczek, Stafford, J. M. +11 · 1 citation
Physics and Astronomy · Mathematics · #High-Energy Particle Collisions Research #Theoretical and Computational Physics #Stochastic processes and statistical mechanics

paper · pdf · doi:10.48550/arxiv.2103.08146

Abstract

We present a strangeness-neutral equation of state for QCD that exhibits critical behavior and matches lattice QCD results for the Taylor-expanded thermodynamic variables up to fourth-order in μ_B/T. It is compatible with the SMASH hadronic transport approach and has a range of temperatures and baryonic chemical potentials relevant for phase II of the Beam Energy Scan at RHIC. We provide an updated version of the software BES-EoS, which produces an equation of state for QCD that includes a critical point in the 3D Ising model universality class. This new version also includes isentropic trejectories and the critical contribution to the correlation length. Since heavy-ion collisions have zero global net-strangeness density and a fixed ratio of electric charge to baryon number, the BES-EoS is more suitable to describe this system. Comparison with the previous version of the EoS is thoroughly discussed.

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• First order transition region of an equation of state for QCD with a critical point

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