Spinodal amplification of density fluctuations in fluid-dynamical simulations of relativistic nuclear collisions

Abstract

Extending a previously developed two-phase equation of state, we simulate head-on relativistic lead-lead collisions with fluid dynamics, augmented with a finite-range term, and study the effects of the phase structure on the evolution of the baryon density. For collision energies that bring the bulk of the system into the mechanically unstable spinodal region of the phase diagram, the density irregularities are being amplified significantly. The resulting density clumping may be exploited as a signal of the phase transition, possibly through an enhanced production of composite particles.

4 pages 4 figures, version accepted by PRL

References in corpus (4)

• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Phase transition dynamics for baryon-dense matter
• (3+1)-Dimensional Hydrodynamic Expansion with a Critical Point from Realistic Initial Conditions
• Density fluctuations in the presence of spinodal instabilities

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