Softening of the Equation of State of Matter at Large Densities and Temperatures: Chiral-Symmetry Restoration Versus Quark Deconfinement
Journal Article
·
· Physical Review Letters
- Dipartimento di Fisica, Universita di Ferrara and INFN, Sezione di Ferrara, 44100 Ferrara (Italy)
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.
- OSTI ID:
- 21024564
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.99.242301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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