scholarly journals Phase structure of a chiral model with dilatons in hot and dense matter

2012 ◽  
Vol 85 (2) ◽  
Author(s):  
Chihiro Sasaki ◽  
Igor Mishustin
Keyword(s):  
Phase Structure ◽  
Dense Matter ◽  
Chiral Model

scholarly journals Role of Δs in determining the properties of neutron stars in parameterized hydrostatic equilibrium

2019 ◽  
Vol 28 (09) ◽  
pp. 1950122 ◽  
Author(s):  
Debashree Sen
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Dense Matter ◽  
Hydrostatic Equilibrium ◽  
Chiral Model ◽  
Equilibrium Conditions ◽  
Self Gravity ◽  
Cold Dense Matter ◽  
Baryonic Mass

The possible existence of [Formula: see text] resonances is inspected in the cold dense matter of neutron star (NS) core in the presence of hyperons. The diverse effects of variation in [Formula: see text] mass on their formation and the equation of state (EoS) are studied in this work with an effective chiral model and the resultant NS properties are calculated with the help of parameterized Tolman–Oppenheimer–Volkoff (PTOV) equations to bring out the two important features of pressure in the context of massive NSs. The [Formula: see text] puzzle is re-explored and resolved taking into account the concept of modified/parametrized inertial pressure and self-gravity in case of massive pulsars like PSR J1614−2230 and PSR J0348-0432. It is seen that although the presence of exotic matter like the hyperons and [Formula: see text] softens the EoS considerably, their presence in massive NSs can be successfully explained with the theory of parametrized hydrostatic equilibrium conditions. The results of this work also satisfy the constraints on [Formula: see text] and [Formula: see text] from the gravitational wave (GW170817) detection of binary NS merger. The constraint on baryonic mass from PSR J0737-3039 is also satisfied with the solutions of the PTOV equations for all the [Formula: see text] masses considered.

scholarly journals Neutron Star Mergers: Probing the EoS of Hot, Dense Matter by Gravitational Waves

Particles ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 44-56 ◽  
Author(s):  
Matthias Hanauske ◽  
Jan Steinheimer ◽  
Anton Motornenko ◽  
Volodymyr Vovchenko ◽  
Luke Bovard ◽  
...  
Keyword(s):  
Phase Transition ◽  
Neutron Star ◽  
Gravitational Waves ◽  
Phase Structure ◽  
Heavy Ions ◽  
Compact Star ◽  
Dense Matter ◽  
Gluon Plasma ◽  
High Energy ◽  
Quark Phase

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 related relativistic collisions of heavy ions and of binary neutron stars mergers. 3 + 1 dimensional special- and general relativistic hydrodynamic simulation studies reveal a unique window of opportunity to observe phase transitions in compressed baryon matter by laboratory based experiments and by astrophysical multimessenger observations. The astrophysical consequences of a hadron-quark phase transition in the interior of a compact star will be focused within this article. Especially with a future detection of the post-merger gravitational wave emission emanated from a binary neutron star merger event, it would be possible to explore the phase structure of quantum chromodynamics. The astrophysical observables of a hadron-quark phase transition in a single compact star system and binary hybrid star merger scenario will be summarized within this article. The FAIR facility at GSI Helmholtzzentrum allows one to study the universe in the laboratory, and several astrophysical signatures of the quark-gluon plasma have been found in relativistic collisions of heavy ions and will be explored in future experiments.

scholarly journals Phase structure in a hadronic chiral model

2007 ◽  
Vol 34 (7) ◽  
pp. 1665-1672 ◽  
Author(s):  
D Zschiesche ◽  
G Zeeb ◽  
S Schramm
Keyword(s):  
Phase Structure ◽  
Chiral Model

Phase structure in a chiral model of nuclear matter

2011 ◽  
Vol 84 (2) ◽  
Author(s):  
Tran Huu Phat ◽  
Nguyen Tuan Anh ◽  
Dinh Thanh Tam
Keyword(s):  
Nuclear Matter ◽  
Phase Structure ◽  
Chiral Model

HADRONIC MATTER AND NUCLEI IN AN EFFECTIVE MODEL

2007 ◽  
Vol 16 (04) ◽  
pp. 1047-1058
Author(s):  
S. SCHRAMM ◽  
D. ZSCHIESCHE ◽  
G. ZEEB ◽  
K.-N. LINN
Keyword(s):  
Neutron Star ◽  
Nuclear Structure ◽  
High Temperatures ◽  
Phase Structure ◽  
Hadronic Matter ◽  
Model Description ◽  
Chiral Model ◽  
Nuclear Deformation ◽  
Wide Range ◽  
Structure Properties

We investigate hadronic matter and nuclear properties within an effective chiral model description. We study nuclear structure properties including nuclear deformation over a wide range of nuclei. Some results on neutron star properties within the model will be presented. We discuss the phase structure of the model at high temperatures and densities in comparison to lattice calculations.

scholarly journals SUSCEPTIBILITIES AND THE PHASE STRUCTURE OF AN EFFECTIVE CHIRAL MODEL WITH POLYAKOV LOOPS

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2319-2324
Author(s):  
CHIHIRO SASAKI ◽  
BENGT FRIMAN ◽  
KRZYSZTOF REDLICH
Keyword(s):  
Phase Transitions ◽  
Phase Structure ◽  
Mean Field ◽  
Field Approximation ◽  
Order Parameters ◽  
Mean Field Approximation ◽  
Chiral Model ◽  
Chiral Phase ◽  
The Mean ◽  
Polyakov Loops

In the Nambu–Jona-Lasinio model with Polyakov loops, we explore the relation between the deconfinement and chiral phase transitions within the mean-field approximation. We focus on the phase structure of the model and study the susceptibilities associated with corresponding order parameters.

Effect of cluster-gradient architecture of nanostructured topocomposites on features of tribointeraction with heterophased material

2020 ◽  
pp. 130-135
Author(s):  
D.N. Korotaev ◽  
K.N. Poleshchenko ◽  
E.N. Eremin ◽  
E.E. Tarasov
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Energy Dissipation ◽  
Phase Structure ◽  
Diffusion Processes ◽  
Structural Phase ◽  
High Wear Resistance ◽  
Wear Characteristics ◽  
And Diffusion

The wear resistance and wear characteristics of cluster-gradient architecture (CGA) nanostructured topocomposites are studied. The specifics of tribocontact interaction under microcutting conditions is considered. The reasons for retention of high wear resistance of this class of nanostructured topocomposites are studied. The mechanisms of energy dissipation from the tribocontact zone, due to the nanogeometry and the structural-phase structure of CGA topocomposites are analyzed. The role of triboactivated deformation and diffusion processes in providing increased wear resistance of carbide-based topocomposites is shown. They are tested under the conditions of blade processing of heat-resistant titanium alloy.

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