QCD at high density: Equation of state for nuclear collisions and neutron stars

  title={QCD at high density: Equation of state for nuclear collisions and neutron stars},
  author={Anton Motornenko and Volodymyr Vovchenko and Jan Steinheimer and Stefan Schramm and Horst Stoecker},
  journal={Nuclear Physics A},
Abstract A unified chiral mean field approach is presented for QCD thermodynamics in a wide range of temperatures and densities. The model simultaneously gives a satisfactory description of lattice QCD thermodynamics and fulfills nuclear matter and astrophysical constraints. The resulting equation of state can be incorporated in relativistic fluid-dynamical simulations of heavy-ion collisions and neutron stars mergers. Access to different regions of the QCD phase diagram can be obtained in… 

Figures from this paper

Equation of state at finite densities for QCD matter in nuclear collisions
We construct the QCD equation of state at finite chemical potentials including net baryon, electric charge, and strangeness, based on the conserved charge susceptibilities determined from lattice QCD
Neutron Star Mergers: Probing the EoS of Hot, Dense Matter by Gravitational Waves
Gravitational waves, electromagnetic radiation, and the emission of high energy particles probe the phase structure of the equation of state of dense matter produced at the crossroad of the closely
On the deconfinement phase transition in neutron-star mergers
We study in detail the nuclear aspects of a neutron-star merger in which deconfinement to quark matter takes place. For this purpose, we make use of the Chiral Mean Field (CMF) model, an effective
Hagedorn bag-like model with a crossover transition meets lattice QCD
Thermodynamic functions, the (higher-order) fluctuations and correlations of conserved charges at $\mu_B = 0$, and the Fourier coefficients of net-baryon density at imaginary $\mu_B$, are considered
Equation of state for hot QCD and compact stars from a mean-field approach
Author(s): Motornenko, A; Steinheimer, J; Vovchenko, V; Schramm, S; Stoecker, H | Abstract: © 2020 authors. Published by the American Physical Society. Published by the American Physical Society
QCD equation of state at finite chemical potentials for relativistic nuclear collisions
We review the equation of state of QCD matter at finite densities. We discuss the construction of the equation of state with net baryon number, electric charge, and strangeness using the results of
Toward a unified equation of state for multi-messenger astronomy
We present a first step in developing a benchmark equation-of-state (EoS) model for multi-messenger astronomy that unifies the thermodynamics of quark and hadronic degrees of freedom. A Lagrangian


Phases of QCD: lattice thermodynamics and a field theoretical model
We investigate three-color QCD thermodynamics at finite quark chemical potential. Lattice QCD results are compared with a generalized Nambu Jona-Lasinio model in which quarks couple simultaneously to
Nuclear matter and neutron stars in a parity doublet model
We investigate the properties of isospin-symmetric nuclear matter and neutron stars in a chiral model approach adopting the SU(2) parity-doublet formulation. This ansatz explicitly incorporates
An effective chiral Hadron-Quark Equation of State Part I: Zero baryochemical potential
We construct an effective model for the QCD equation of state, taking into account chiral symmetry restoration as well as the deconfinement phase transition. The correct asymptotic degrees of freedom
van der Waals Interactions in Hadron Resonance Gas: From Nuclear Matter to Lattice QCD.
An extension of the ideal hadron resonance gas (HRG) model is constructed which includes the attractive and repulsive van der Waals (VDW) interactions between baryons. This VDW-HRG model yields the
QCD equation of state to O(mu(6)(B)) from lattice QCD
We calculated the QCD equation of state using Taylor expansions that include contributions from up to sixth order in the baryon strangeness and electric charge chemical potentials. Calculations have
Rotational properties of hypermassive neutron stars from binary mergers
Determining the differential-rotation law of compact stellar objects produced in binary neutron stars mergers or core-collapse supernovae is an old problem in relativistic astrophysics. Addressing
Higher order fluctuations and correlations of conserved charges from lattice QCD
A bstractWe calculate several diagonal and non-diagonal fluctuations of conserved charges in a system of 2+1+1 quark flavors with physical masses, on a lattice with size 483 × 12. Higher order
Equation of state in ( 2+1 )-flavor QCD
We present results for the equation of state in ( 2 + 1 )-flavor QCD using the highly improved staggered quark action and lattices with temporal extent N τ = 6 , 8, 10, and 12. We show that these
The hadronic SU(3) Parity Doublet Model for Dense Matter, its extension to quarks and the strange equation of state
A chiral model is introduced that is based on the parity doublet formulation of chiral symmetry including hyperonic degrees of freedom. The phase structure of the model is determined. Depending on
Cluster expansion model for QCD baryon number fluctuations: No phase transition at μB/T
Cluster Expansion Model (CEM), representing a relativistic extension of Mayer's cluster expansion, is constructed to study baryon number fluctuations in QCD. The temperature dependent first two