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arXiv · 1612.05448

Effect of the Coulomb interaction on the liquid-gas phase transition of nuclear matter

Rana Nandi·Stefan Schramm
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Abstract

We investigate the role of the Coulomb interaction on the liquid-gas phase transition of nuclear matter with three different values of proton fraction ($Y_p$=0.5,0.3 and 0.1), relevant for heavy-ion physics as well as various astrophysical scenarios, within the framework of quantum molecular dynamics. We perform simulations for a wide range of density and temperature with and without the Coulomb interaction and calculate the two-point correlation functions of nucleon density fluctuations for all the configurations to determine the phase transition region. We also determine the critical end point of the liquid-gas phase transition for all three values of proton fraction considered. We observe that the Coulomb interaction reduces the transition temperature by about 2 MeV for nuclear matter with $Y_p$=0.5 and 0.3 and by about 1 MeV for nuclear matter with $Y_p$=0.1. However, the critical density is found to be more or less insensitive to the Coulomb interaction.

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Rana Nandi, Stefan Schramm. 2017-06-07. Effect of the Coulomb interaction on the liquid-gas phase transition of nuclear matter. https://doi.org/10.1103/physrevc.95.065801

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