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In this contribution, we outline a new 2-phase description of the quark-nuclear matter hybrid equation of state that takes into account effects of phase space occupation (excluded volume) in both, the hadronic and the quark matter phases.…

Nuclear Theory · Physics 2016-02-05 D. E. Alvarez-Castillo , M. A. R. Kaltenborn , D. Blaschke

A two-phase description of the quark-nuclear matter hybrid equation of state that takes into account the effect of excluded volume in both the hadronic and the quark matter phases is introduced. The nuclear phase manifests a reduction of…

High Energy Astrophysical Phenomena · Physics 2017-10-04 Mark Alexander Randolph Kaltenborn , Niels-Uwe Friedrich Bastian , David Bernhard Blaschke

We study cold strange quark stars employing an enhanced version of the quark-mass density-dependent model which incorporates excluded volume effects to address non-perturbative QCD repulsive interactions. We provide a comparative analysis…

Nuclear Theory · Physics 2024-05-29 G. Lugones , A. G. Grunfeld

The single-flavor excluded-volume model based on the effective size of baryons reproduces the hard-soft density evolution of the equation of state (EoS) required by the recent studies of GW170817. This phenomenological model basically…

Nuclear Theory · Physics 2020-08-21 Dyana C. Duarte , Saul Hernandez-Ortiz , Kie Sang Jeong

In this paper, we generalize the improved quasi-particle model proposed in J. Cao et al., [ Phys. Lett. B {\bf711}, 65 (2012)] from finite temperature and zero chemical potential to the case of finite chemical potential and zero…

High Energy Physics - Phenomenology · Physics 2013-11-20 Liu-jun Luo , Jing Cao , Yan Yan , Wei-Min Sun , Hong-Shi Zong

Excluded volume effects are incorporated in the quark meson coupling model to take into account in a phenomenological way the hard core repulsion of the nuclear force. The formalism employed is thermodynamically consistent and does not…

Nuclear Theory · Physics 2009-11-07 P. K. Panda , M. E. Bracco , M. Chiapparini , E. Conte , G. Krein

Inspired by the excluded volume model for isospin symmetric quarkyonic matter, we construct an `excluded volume' model for a charge neutral quarkyonic phase whose hadronic sector contains only neutrons. We refer to this model as quarkyonic…

High Energy Astrophysical Phenomena · Physics 2021-09-01 Srimoyee Sen , Lars Sivertsen

The effects of a finite system volume on thermodynamic quantities, such as the pressure, energy density, specific heat, speed of sound, conserved charge susceptibilities and correlations, in hot and dense strongly interacting matter are…

High Energy Physics - Phenomenology · Physics 2024-01-12 Somenath Pal , Anton Motornenko , Volodymyr Vovchenko , Abhijit Bhattacharyya , Jan Steinheimer , Horst Stoecker

In this paper, we give a direct method for calculating the partition function, and hence the equation of state (EOS) of Quantum Chromodynamics (QCD) at finite chemical potential and zero temperature. In the EOS derived in this paper the…

High Energy Physics - Phenomenology · Physics 2008-11-26 Hong-shi Zong , Wei-min Sun

Incorporation of the finite size of baryons into the equation of state (EOS) of a hot and dense hadron gas (HG) in a thermodynamically consistent manner has been a much studied problem. We first review its current status. Various models…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Mishra , C. P. Singh

We investigate the effect of the inclusion of relativistic Coulomb terms in a confined-isospin-density-dependent-mass (CIDDM) model of strange quark matter (SQM). We found that if we include Coulomb term in scalar density form, SQM equation…

Nuclear Theory · Physics 2016-05-11 A. I. Qauli , A. Sulaksono

In this paper we apply the equation of state (EOS) of QCD at finite chemical potential and zero temperature proposed in H. S. Zong and W. M. Sun [Int. J. Mod. Phys. {\bf A23}, 3591 (2008)] to the study of properties of quark star. This EOS…

High Energy Physics - Phenomenology · Physics 2015-03-17 Hua Li , Xin-Lian Luo , Yu Jiang , Hong-Shi Zong

We discuss the properties of the extended three-flavor quark-meson diquark (EQMD) model as a renormalizable low-energy effective model for QCD. The effective degrees of freedom are quarks, scalar- and pseudoscalar mesons, diquarks, vector-…

High Energy Physics - Phenomenology · Physics 2026-05-08 Jens O. Andersen , Mathias P. Nødtvedt

We introduce a theoretical framework to analyze the thermal properties of a recently proposed "excluded volume" model of quarkyonic matter. This entails proposing finite temperature distribution functions and entropy functionals constrained…

Nuclear Theory · Physics 2021-02-03 Srimoyee Sen , Neill C. Warrington

Solutions of the quark gap equation and the corresponding vacuum pressure are investigated within a modified Nambu-Jona-Lasinio model, which is a basic issue for studying the QCD equation of state (EOS) and the properties of hypothetical…

High Energy Physics - Phenomenology · Physics 2026-04-27 Cheng-Ming Li , Guang-Hao Yu , Ya-Peng Zhao , Zhibin Li , Jin-Li Zhang , Yong-Liang Ma , Yong-Feng Huang

We revisit the quark-mass density-dependent model -- a phenomenological equation of state for deconfined quark matter in the high-density low-temperature regime -- and show that thermodynamic inconsistencies that have plagued the model for…

Nuclear Theory · Physics 2023-03-08 G. Lugones , A. G. Grunfeld

In this article the role of the supersaturation density equation of state (EOS) is explored in simulations of failed core-collapse supernova explosions. Therefore the nuclear EOS is extended via a one-parameter excluded volume description…

High Energy Astrophysical Phenomena · Physics 2016-04-07 Tobias Fischer

We consider thermodynamics of the excluded volume particles at finite temperature and chemical potential, in the low density approximation. We assume Boltzmann statistics and study the influence of the excluded volume on an ideal gas…

High Energy Physics - Phenomenology · Physics 2016-02-17 Krzysztof Redlich , Kacper Zalewski

We explore the consequences of an equation of state (EOS) obtained in a confining Dyson-Schwinger equation model of QCD for the structure and stability of nonstrange quark stars at finite-T, and compare the results with those obtained using…

Nuclear Theory · Physics 2010-03-04 D. Blaschke , H. Grigorian , G. Poghosyan , C. D. Roberts , S. Schmidt

The formalism to augment the classical models of equation of state for real gases with the quantum statistical effects is presented. It allows an arbitrary excluded volume procedure to model repulsive interactions, and an arbitrary…

Nuclear Theory · Physics 2017-09-29 Volodymyr Vovchenko
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