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arXiv · 2103.08146

Strangeness neutral equation of state for QCD with a critical point

J. M. Stafford·D. Mroczek·A. R. Nava Acuna·J. Noronha-Hostler·P. Parotto·D. R. P. Price·C. Ratti
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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 $\mu_B/T$. 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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J. M. Stafford, D. Mroczek, A. R. Nava Acuna, J. Noronha-Hostler, P. Parotto, D. R. P. Price, C. Ratti. 2021-03-15. Strangeness neutral equation of state for QCD with a critical point. https://arxiv.org/abs/2103.08146

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