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Type: Artigo de periódico
Title: Phase transition of the nucleon-antinucleon plasma at different ratios
Author: Delfino, A
Jansen, M
Timoteo, VS
Abstract: We investigate phase transitions for the Walecka model at very high temperatures. As is well known, depending on the parametrization of this model and for the particular case of a zero chemical potential (mu), a first-order phase transition is possible [J. Theis, G. Graebner, G. Buchwald, J. A. Maruhn, W. Greiner, H. Stocker, and J. Polonyi, Phys. Rev. D 28, 2286 (1983)]. We investigate this model for the case in which mu not equal 0. It turns out that, in this situation, phases with different values of antinucleon-nucleon ratios and net baryon densities may coexist. We present the temperature versus antinucleon-nucleon ratio as well as the temperature versus the net baryon density for the coexistence region. The temperature versus chemical potential phase diagram is also presented.
Country: EUA
Editor: Amer Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevC.78.034909
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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