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Title: Softening of the Equation of State of Matter at Large Densities and Temperatures: Chiral-Symmetry Restoration Versus Quark Deconfinement

Abstract

We discuss two models in which a softening of the equation of state takes place due to the appearance of new degrees of freedom. The first is a hadronic model in which the softening is due to chiral symmetry restoration. In the second model the softening is associated with the formation of clusters of quarks in the mixed phase. We show that in the first case the bulk modulus is mainly dependent on the density, while in the mixed-phase model the bulk modulus strongly depends on the temperature and it is not vanishing due to the presence of two conserved charges, the baryon and the isospin one.

Authors:
; ;  [1]
  1. Dipartimento di Fisica, Universita di Ferrara and INFN, Sezione di Ferrara, 44100 Ferrara (Italy)
Publication Date:
OSTI Identifier:
21024564
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 99; Journal Issue: 24; Other Information: DOI: 10.1103/PhysRevLett.99.242301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; CHIRAL SYMMETRY; DEGREES OF FREEDOM; EQUATIONS OF STATE; ISOSPIN; MATTER; QUARKS

Citation Formats

Bonanno, Luca, Drago, Alessandro, Lavagno, Andrea, and Dipartimento di Fisica, Politecnico di Torino and INFN, Sezione di Torino, 10125 Turin. Softening of the Equation of State of Matter at Large Densities and Temperatures: Chiral-Symmetry Restoration Versus Quark Deconfinement. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.99.242301.
Bonanno, Luca, Drago, Alessandro, Lavagno, Andrea, & Dipartimento di Fisica, Politecnico di Torino and INFN, Sezione di Torino, 10125 Turin. Softening of the Equation of State of Matter at Large Densities and Temperatures: Chiral-Symmetry Restoration Versus Quark Deconfinement. United States. https://doi.org/10.1103/PHYSREVLETT.99.242301
Bonanno, Luca, Drago, Alessandro, Lavagno, Andrea, and Dipartimento di Fisica, Politecnico di Torino and INFN, Sezione di Torino, 10125 Turin. 2007. "Softening of the Equation of State of Matter at Large Densities and Temperatures: Chiral-Symmetry Restoration Versus Quark Deconfinement". United States. https://doi.org/10.1103/PHYSREVLETT.99.242301.
@article{osti_21024564,
title = {Softening of the Equation of State of Matter at Large Densities and Temperatures: Chiral-Symmetry Restoration Versus Quark Deconfinement},
author = {Bonanno, Luca and Drago, Alessandro and Lavagno, Andrea and Dipartimento di Fisica, Politecnico di Torino and INFN, Sezione di Torino, 10125 Turin},
abstractNote = {We discuss two models in which a softening of the equation of state takes place due to the appearance of new degrees of freedom. The first is a hadronic model in which the softening is due to chiral symmetry restoration. In the second model the softening is associated with the formation of clusters of quarks in the mixed phase. We show that in the first case the bulk modulus is mainly dependent on the density, while in the mixed-phase model the bulk modulus strongly depends on the temperature and it is not vanishing due to the presence of two conserved charges, the baryon and the isospin one.},
doi = {10.1103/PHYSREVLETT.99.242301},
url = {https://www.osti.gov/biblio/21024564}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 24,
volume = 99,
place = {United States},
year = {Fri Dec 14 00:00:00 EST 2007},
month = {Fri Dec 14 00:00:00 EST 2007}
}