Chemical and mechanical instability in warm and dense nuclear matter

Abstract

We investigate the possible thermodynamic instability in a warm and dense nuclear medium (T<50 MeV and ρ_0<ρ_B< 3ρ_0) where a phase transition from nucleonic matter to resonance-dominated Delta-matter can take place. The analysis is performed by requiring the global conservation of baryon and electric charge numbers in the framework of a relativistic equation of state. Similarly to the liquid-gas phase transition, we show that the nucleon-Delta matter phase transition is characterized by both mechanical instability (fluctuations on the baryon density) and by chemical-diffusive instability (fluctuations on the charge concentration) in asymmetric nuclear matter. We then perform an investigation and a comparative study on the different nature of such instabilities and phase transitions.

12 pages, 15 figures

References in corpus (5)

• Testing Deconfinement at High Isospin Density
• Hadronic resonance production in $d$+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV at RHIC
• Hot and dense hadronic matter in an effective mean field approach
• Softening of the equation of state of matter at large densities and temperatures: chiral symmetry restoration vs. quark deconfinement
• Differential isospin-fractionation in dilute asymmetric nuclear matter

Cited by in corpus (1)

• Nonextensive statistical effects and strangeness production in hot and dense nuclear matter