Quark deconfinement phase transition in nuclear matter for improved quark mass density-dependent model
Chen Wu1a, Wei-Liang Qian2, Yu-Gang Ma1, Guo-Qiang Zhang1 and Sanjeev Kumar1
Shanghai Institute of Applied Physics, Chinese Academic of Sciences - Shanghai 201800, China
2 Universidade de Ouro Preto - Ouro Preto, 35400-000, Brazil
Accepted: 19 March 2012
The improved quark mass density-dependent (IQMDD) model, which has been successfully used to describe the properties of both infinite nuclear matter and finite nuclei, is applied to investigate the properties of quark deconfinement phase transition. By using the finite temperature quantum field theory, we calculate the finite temperature effective potential and extend the IQMDD model to finite temperature and finite nuclear matter density. The critical temperature and the critical density of nuclear matter are given and the QCD phase diagram is addressed. It is shown that this model can not only describe the saturation properties of nuclear matter, but also explain the quark deconfinement phase transition successfully.
PACS: 11.10.Wx – Finite-temperature field theory / 12.39.Ba – Bag model / 25.75.Nq – Quark deconfinement, quark-gluon plasma production, and phase transitions
© EPLA, 2012