scholarly journals QCD equation of state at finite baryon density with fugacity expansion

2019 ◽  
Author(s):  
Volodymyr Vovchenko ◽  
Jan Steinheimer ◽  
Owe Philipsen ◽  
Horst Stoecker
Keyword(s):  
Equation Of State ◽  
Baryon Density ◽  
Fugacity Expansion

scholarly journals Lattice-based QCD equation of state at finite baryon density: Cluster Expansion Model

2019 ◽  
Vol 982 ◽  
pp. 859-862 ◽  
Author(s):  
V. Vovchenko ◽  
J. Steinheimer ◽  
O. Philipsen ◽  
A. Pásztor ◽  
Z. Fodor ◽  
...  
Keyword(s):  
Equation Of State ◽  
Cluster Expansion ◽  
Baryon Density ◽  
Expansion Model

scholarly journals NUMERICAL STUDY OF THE EQUATION OF STATE FOR TWO FLAVOR QCD AT NON-ZERO BARYON DENSITY

2005 ◽  
Author(s):  
S. EJIRI ◽  
C.R. ALLTON ◽  
M. DÖRING ◽  
S.J. HANDS ◽  
O. KACZMAREK ◽  
...  
Keyword(s):  
Equation Of State ◽  
Numerical Study ◽  
Baryon Density

scholarly journals Thermal properties of hot and dense matter: Influence of rapid rotation on protoneutron stars, hot neutron stars, and neutron star merger remnants

2021 ◽  
Vol 252 ◽  
pp. 05004
Author(s):  
Polychronis Koliogiannis ◽  
Charalampos Moustakidis
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Equations Of State ◽  
Interaction Model ◽  
Dense Matter ◽  
Baryon Density ◽  
Dense Nuclear Matter ◽  
Protoneutron Stars

The knowledge of the equation of state is a key ingredient for many dynamical phenomena that depend sensitively on the hot and dense nuclear matter, such as the formation of protoneutron stars and hot neutron stars. In order to accurately describe them, we construct equations of state at FInite temperature and entropy per baryon for matter with varying proton fractions. This procedure is based on the momentum dependent interaction model and state-of-the-art microscopic data. In addition, we investigate the role of thermal and rotation effects on microscopic and macroscopic properties of neutron stars, including the mass and radius, the frequency, the Kerr parameter, the central baryon density, etc. The latter is also connected to the hot and rapidly rotating remnant after neutron star merger. The interplay between these quantities and data from late observations of neutron stars, both isolated and in matter of merging, could provide useful insight and robust constraints on the equation of state of nuclear matter.

scholarly journals JAM: an event generator for high energy nuclear collisions

2019 ◽  
Vol 208 ◽  
pp. 11004
Author(s):  
Yasushi Nara
Keyword(s):  
Fluid Dynamics ◽  
Equation Of State ◽  
Transport Model ◽  
High Energy ◽  
Baryon Density ◽  
Collective Effects ◽  
Event Generator ◽  
Collision Term ◽  
Nuclear Collisions ◽  
Recent Developments

We review recent developments of an event generator JAM microscopic transport model to simulate high energy nuclear collisions, especially at high baryon density regions. Recent developments focus on the collective effects: implementation of nuclear potentials, equation of state (EoS) modified collision term, and dynamical integration of fluid dynamics. With these extensions, we can discuss the EoS dependence of the transverse collective flows.

scholarly journals QCD equation of state at vanishing and high baryon density: Chiral Mean Field model

2021 ◽  
Vol 1005 ◽  
pp. 121836
Author(s):  
Anton Motornenko ◽  
Jan Steinheimer ◽  
Volodymyr Vovchenko ◽  
Stefan Schramm ◽  
Horst Stoecker
Keyword(s):  
Equation Of State ◽  
Field Model ◽  
Mean Field ◽  
Baryon Density ◽  
Mean Field Model

scholarly journals EQUILIBRIUM CONFIGURATIONS FOR QUARK–DIQUARK STARS AND THE PROBLEM OF HER X-1 MASS

1998 ◽  
Vol 07 (01) ◽  
pp. 19-27 ◽  
Author(s):  
J. E. HORVATH ◽  
J. A. DE FREITAS PACHECO
Keyword(s):  
Equation Of State ◽  
Physical Properties ◽  
Nuclear Matter ◽  
Stable State ◽  
Baryon Density ◽  
Matter Density ◽  
X Ray ◽  
Nuclear Matter Density ◽  
Equilibrium Configurations ◽  
Stellar Models

We report new calculations of the physical properties of a quark–diquark plasma. A vacuum contribution is taken into account and is responsible for the appearance of a stable state at zero pressure and at a baryon density of about 2.2 times the nuclear matter density in this model. The resulting equation of state was used to integrate numerically the Tolman–Oppenheimer–Volkoff equations. The mass-radius relationship has been derived from a series of equilibrium configurations constituted by a mixture of quarks and diquarks. These stellar models, which are representative of a whole class, may be helpful to understand the possible compactness of the X-ray source Her X-1 and related objects.

scholarly journals Effects of equation of state on hydrodynamic expansion, spectra, flow harmonics and two-pion interferometry

2018 ◽  
Vol 27 (07) ◽  
pp. 1850058 ◽  
Author(s):  
Danuce M. Dudek ◽  
Wei-Liang Qian ◽  
Chen Wu ◽  
Otávio Socolowski ◽  
Sandra S. Padula ◽  
...  
Keyword(s):  
Equation Of State ◽  
Equations Of State ◽  
Initial Conditions ◽  
Heavy Ion ◽  
Baryon Density ◽  
Extensive Study ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Pion Interferometry ◽  
Hydrodynamic Evolution

We perform an extensive study of the role played by the equation of state (EoS) in the hydrodynamic evolution of the matter produced in relativistic heavy ion collisions. By using the same initial conditions and freeze-out scenario, the effects of different equations of state are compared by calculating their respective hydrodynamical evolution, particle spectra, harmonic flow coefficients [Formula: see text], [Formula: see text] and [Formula: see text] and two-pion interferometry radius parameters. The equations of state investigated contain distinct features, such as the nature of the phase transition, as well as strangeness and baryon density contents, which are expected to lead to different hydrodynamic responses. The results of our calculations are compared to the data recorded at two RHIC energies, 130[Formula: see text]GeV and 200[Formula: see text]GeV. The three equations of state used in the calculations are found to describe the data reasonably well. Differences can be observed among the studied observables, but they are quite small. In particular, the collective flow parameters are found not to be sensitive to the choice of the EOS, whose implications are discussed.

scholarly journals Equation of state at non-zero baryon density based on lattice QCD

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Pasi Huovinen ◽  
Péter Petreczky ◽  
Christian Schmidt
Keyword(s):  
Equation Of State ◽  
Lattice Qcd ◽  
Quark Mass ◽  
Taylor Expansion ◽  
Baryon Density ◽  
Lattice Equation ◽  
Taylor Coefficients ◽  
Hadron Masses ◽  
Quark Mass Dependence ◽  
Expansion Coefficients

AbstractWe employ the lattice QCD data on Taylor expansion coefficients to extend our previous parametrization of the equation of state to finite baryon density. When we take into account lattice spacing and quark mass dependence of the hadron masses, the Taylor coefficients at low temperature are equal to those of hadron resonance gas. Parametrized lattice equation of state can thus be smoothly connected to the hadron resonance gas equation of state at low temperatures.

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