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Matter in neutron star collisions can reach densities up to few times the nuclear saturation threshold and temperatures up to one hundred MeV. Understanding the structure and composition of such matter requires many-body nonperturbative…

广义相对论与量子宇宙学 · 物理学 2019-09-04 Albino Perego , Sebastiano Bernuzzi , David Radice

In nucleus-nucleus collisions at ultra-relativistic energies matter is formed with initial energy density significantly exceeding the critical energy density for the transition from hadronic to partonic matter. We will review the…

核实验 · 物理学 2009-11-10 P. Braun-Munzinger

I use simple thermodynamic reasoning to argue that at temperatures of order a trillion kelvin, QCD, the theory which describes strongly interacting particles such as protons and neutrons under normal conditions, undergoes a phase transition…

物理教育 · 物理学 2008-11-26 Simon Hands

We show that within a recently developed nonlocal, chiral quark model the critical densities for a phase transition to color superconducting quark matter under neutron star conditions can be low enough that these phases occur in compact…

天体物理学 · 物理学 2017-08-23 D. Blaschke , D. N. Voskresensky , H. Grigorian

The detection of gravitational waves from a neutron star merger has opened up the possibility of detecting the presence or creation of deconfined quark matter using the gravitational wave signal. To investigate this possibility, we…

高能天体物理现象 · 物理学 2019-10-02 Paul M. Chesler , Niko Jokela , Abraham Loeb , Aleksi Vuorinen

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…

高能物理 - 唯象学 · 物理学 2019-02-20 Anton Motornenko , Volodymyr Vovchenko , Jan Steinheimer , Stefan Schramm , Horst Stoecker

Binary neutron star mergers are expected to be one of the most promising source of gravitational waves (GW) for the network of laser interferometric and bar detectors becoming operational in the next few years. The merger wave signal is…

天体物理学 · 物理学 2015-06-24 R. Oechslin , G. Poghosyan , K. Uryu

The recent detection of gravitational waves from merging neutron star events has opened a new window on the many unknown aspects of their internal dynamics. A key role in this context is played by the transition from baryon to quark matter…

高能物理 - 唯象学 · 物理学 2019-10-08 Abha Rajan , Tyler Gorda , Simonetta Liuti , Kent Yagi

The gravitational waves emitted from a binary neutron star merger, as predicted from general relativistic magneto-hydrodynamics calculations, are sensitive to the appearance of quark matter and the stiffness of the equation of state of QCD…

高能物理 - 唯象学 · 物理学 2019-07-16 Anton Motornenko , Jan Steinheimer , Volodymyr Vovchenko , Stefan Schramm , Horst Stoecker

We study the impact of finite-temperature effects in numerical-relativity simulations of binary neutron star mergers with microphysical equations of state and neutrino transport in which we vary the effective nucleon masses in a controlled…

高能天体物理现象 · 物理学 2023-08-01 Jacob Fields , Aviral Prakash , Matteo Breschi , David Radice , Sebastiano Bernuzzi , André da Silva Schneider

In this paper we investigate quark deconfinement in neutrons stars and their mergers, focusing on the effects of higher orders for the phase transition between hadronic and quark matter. The different descriptions we use to describe matter…

The possible role of a first order QCD phase transition at nonvanishing quark chemical potential and temperature for cold neutron stars and for supernovae is delineated. For cold neutron stars, we use the NJL model with nonvanishing color…

The effect of the QCD phase transition is studied for the mass-radius relation of compact stars and for hot and dense matter at a given proton fraction used as input in core-collapse supernova simulations. The phase transitions to the 2SC…

天体物理学 · 物理学 2009-11-13 Irina Sagert , Giuseppe Pagliara , Matthias Hempel , Jürgen Schaffner-Bielich

At the extreme densities reached in the core of neutron stars, it is possible that quark deconfined matter is produced. The formation of this new phase of strongly interacting matter is likely to occur via a first-order phase transition for…

核理论 · 物理学 2024-10-14 Mirco Guerrini , Giuseppe Pagliara , Alessandro Drago , Andrea Lavagno

For finite chemical potential effective models of QCD predict a first order phase transition. In favour for the search of such a phase transition in nature, we construct an equation of state for strange quark matter based on the MIT bag…

太阳与恒星天体物理 · 物理学 2010-07-28 T. Fischer , I. Sagert , M. Hempel , G. Pagliara , J. Schaffner-Bielich , A. Mezzacappa , F. -K. Thielemann , M. Liebendorfer

The holographic models for dense QCD matter work surprisingly well. A general implication seems that the deconfinement phase transition dictates the maximum mass of neutron stars. The nuclear matter phase turns out to be rather stiff which,…

高能物理 - 唯象学 · 物理学 2022-02-16 Niko Jokela

Important progress in understanding the behavior of hadronic matter at high density has been achieved recently, by adapting the techniques of condensed matter theory. At asymptotic densities, the combination of asymptotic freedom and BCS…

高能物理 - 唯象学 · 物理学 2016-11-23 Krishna Rajagopal , Frank Wilczek

We study the importance of the thermal behavior of the hadron-quark phase transition in neutron star (NS) mergers. To this end, we devise a new scheme approximating thermal effects to supplement any cold, barotropic hybrid equation of state…

高能天体物理现象 · 物理学 2023-10-02 Sebastian Blacker , Andreas Bauswein , Stefan Typel

We discuss cold dense QCD by examining constraints from neutron stars, nuclear experiments, and QCD calculations at low and high baryon density. The two solar mass constraint and suggestive small radii (10~13 km) of neutron stars constrain…

高能天体物理现象 · 物理学 2017-02-28 Toru Kojo

We investigate the influence of a phase transition from hadronic matter to a deconfined quark phase inside a neutron star on its cooling behaviour including the appearance of twin star solutions in the mass-radius diagram. We find that…

高能天体物理现象 · 物理学 2025-02-21 Melissa Mendes , Jan-Erik Christian , Farrukh J. Fattoyev , Jürgen Schaffner-Bielich