https://doi.org/10.1140/epjp/s13360-021-01615-5
Regular Article
Strangeness-neutral equation of state for QCD with a critical point
1
Department of Physics, University of Houston, 77204, Houston, TX, USA
2
Department of Physics, University of Illinois at Urbana-Champaign, 61801, Urbana, IL, USA
3
Department of Physics, University of Wuppertal, 42119, Wuppertal, Germany
Received:
12
April
2021
Accepted:
26
May
2021
Published online:
3
June
2021
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 
. 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 trajectories 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.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
