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Thermodynamic instabilities in high energy heavy-ion collisions

A. Lavagno

Department of Applied Science and Technology, Politecnico di Torino, I-10129 Torino, Italy

INFN, Sezione di Torino, I-10125 Torino, Italy

E-mail Address: [email protected]

Corresponding author.

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D. Pigato

Department of Applied Science and Technology, Politecnico di Torino, I-10129 Torino, Italy

INFN, Sezione di Torino, I-10125 Torino, Italy

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G. Gervino

Department of Applied Science and Technology, Politecnico di Torino, I-10129 Torino, Italy

Dipartimento di Fisica, Università di Torino, I-10126 Torino, Italy

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https://doi.org/10.1142/S021798491550092XCited by:0 (Source: Crossref)

Abstract

One of the very interesting aspects of high energy heavy-ion collisions experiments is a detailed study of the thermodynamical properties of strongly interacting nuclear matter away from the nuclear ground state. In this direction, many efforts were focused on searching for possible phase transitions in such collisions. We investigate thermodynamic instabilities in a hot and dense nuclear medium where a phase transition from nucleonic matter to resonance-dominated $Δ$ -matter can take place. Such a phase transition can be characterized by both mechanical instability (fluctuations on the baryon density) and by chemical-diffusive instability (fluctuations on the strangeness concentration) in asymmetric nuclear matter. In analogy with the liquid–gas nuclear phase transition, hadronic phases with different values of antibaryon–baryon ratios and strangeness content may coexist. Such a physical regime could be, in principle, investigated in the future high-energy compressed nuclear matter experiments which will make it possible to create compressed baryonic matter with a high net baryon density.

Keywords:

PACS: 21.65.f, 64.10.+h, 25.75.q

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