A three-parameter crossover equation of state reproduces lattice QCD thermodynamics and places the hadron-to-parton switching temperature at ~216 MeV, implying hadrons remain important up to ~250 MeV.
Equation of state for hot QCD and compact stars from a mean field approach
4 Pith papers cite this work. Polarity classification is still indexing.
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abstract
The thermodynamic properties of high temperature and high density QCD-matter are explored within the Chiral SU(3)-flavor parity-doublet Polyakov-loop quark-hadron mean-field model, CMF. The quark sector of the CMF model is tuned to describe the $\mu_B=0$ thermodynamics data of lattice QCD. The resulting lines of constant physical variables as well as the baryon number susceptibilities are studied in some detail in the temperature/chemical potential plane. The CMF model predicts three consecutive transitions, the nuclear first-order liquid-vapor phase transition, chiral symmetry restoration, and the cross-over transition to a quark-dominated phase. All three phenomena are cross-over, for most of the $T-\mu_B$-plane. The deviations from the free ideal hadron gas baseline at $\mu_B=0$ and $T\approx 100-200$ MeV can be attributed to remnants of the liquid-vapor first order phase transition in nuclear matter. The chiral crossing transition determines the baryon fluctuations at much higher $\mu_B\approx1.5$ GeV, and at even higher baryon densities $\mu_B\approx2.4$ GeV, the behavior of fluctuations is controlled by the deconfinement cross-over. The CMF model also describe well the static properties of high $\mu_B$ neutron stars as well as the new neutron star merger observations. The effective EoS presented here describes simultaneously lattice QCD results at $\mu_B=0$, as well as observed physical phenomena (nuclear matter and neutron star matter) at $T\cong0$ and high densities, $\mu_B>1$ GeV.
representative citing papers
A physics-informed neural network produces a thermodynamically consistent 4D equation of state for QCD matter that reproduces lattice QCD and hadron resonance gas results while extrapolating to high baryon density for use in hybrid hydrokinetic models.
Predictions for collective flow in O-O collisions at 5.36 TeV are generated with SMASH-vHLLE hybrid, pure SMASH, and Angantyr models to probe the onset of QGP formation in small systems.
A unified QCD equation of state is advocated for neutron star mergers and heavy ion collisions so that gravitational wave signals and lab flow/fluctuation data can jointly constrain the phase structure of dense matter.
citing papers explorer
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Hadronic and partonic composition of QCD matter across the crossover
A three-parameter crossover equation of state reproduces lattice QCD thermodynamics and places the hadron-to-parton switching temperature at ~216 MeV, implying hadrons remain important up to ~250 MeV.
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Equation of State at High Baryon Densities from a Thermodynamically Informed Neural Network
A physics-informed neural network produces a thermodynamically consistent 4D equation of state for QCD matter that reproduces lattice QCD and hadron resonance gas results while extrapolating to high baryon density for use in hybrid hydrokinetic models.
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Collective effects in O-O and Ne-Ne collisions at $\sqrt{s_{\mathrm{NN}}}$=5.36 TeV from a hybrid approach
Predictions for collective flow in O-O collisions at 5.36 TeV are generated with SMASH-vHLLE hybrid, pure SMASH, and Angantyr models to probe the onset of QGP formation in small systems.
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Matter And Gravitation In Collisions of heavy ions and neutron stars: equation of state
A unified QCD equation of state is advocated for neutron star mergers and heavy ion collisions so that gravitational wave signals and lab flow/fluctuation data can jointly constrain the phase structure of dense matter.