Phase Transition in Warm Nuclear Matter with Alternative Derivative Coupling Models
M. Malheiro, A. Delfino, C. T. Coelho
Abstract
An analysis is performed of the liquid-gas phase transition of nuclear matter obtained from different versions of scalar derivate coupling suggested by Zimanyi and Moszkowski (ZM) and the results are compared with those obtained from the Walecka model. We present the phase diagram for the models and one of them, the ZM3 model, has the lowest critical temperature Tc=13.6 MeV with the lowest critical density ρc=0.037 fm-3 and pressure pc=0.157 MeV fm-3. These results are in accord with recent observations from energetic heavy-ion collisions, which suggest a small liquid-gas phase region.
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