PHASE STRUCTURE IN AN ASYMMETRIC MODEL OF NUCLEAR MATTER
Main Article Content
Abstract
The phase structure of asymmetric nuclear matter in the extended Nambu - Jona-Lasinio (ENJL) model is studied by means of the effective potential in the one-loop approximation. It is found that the critical temperature for the liquid-gas phase transition decreases with increasing neutron excess. A typical firstorder phase transition of the liquid-gas transition occurs for y > 0:35 and eventually turns out to be second order for smaller y, here y is the proton fraction.
PACS numbers: 11.30.Rd, 05.70.Fh, 21.65.-f.
Article Details
Keywords
isospin asymmetry, phase transition, nuclear matter
References
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in Chiral Model of Nuclear Matter, Summited to Comm. in Phys, 2011.
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[33] B. A. Li and L. W. Chen, Phys. Rev. C72, 064611, 2005.
[34] L.W.Chen, C. M. Ko, and B. A. Li, Phys. Rev. Lett. 94, 032701, 2005.
[35] M. B. Tsang et al., Phys. Rev. Lett. 92, 062701, 2004.
[36] C. B. Das, S. Das Gupta, C. Gale, and B. A. Li, Phys. Rev. C67, 034611 2003.
[37] M. Lopez-Quelle, S. Marcos, R. Niembo, A. Bouyssy, and N. Van Giai, Nucl. Phys. A483, 479, 1988.
[38] M. Prakash and K. S. Bedell, Phys. Rev. C32, 1118, 1985.
[39] V. Baran, M. Colonna,M.Di Toro, V. Greco, M. Zielinska-Pfabe, and M. H. Wolter, Nucl. Phys. A703, 603, 2002.
[40] T. Li et al., arXiv:0709.0567.
[41] T.T.S. Kuo, S. Ray, J. Shamanna and R.K. Su, Int. Jour. of Modern Phys. E: Nucl. Phys. 5, 303, 1996; S. Ray, J. Shamanna and T.T.S. Kuo, Phys. Lett. B, 1996, in press; T.T.S. Kuo, S. Ray, J. Shamanna, R.K. Su, SUNY-preprint, 1996.
[42] L.G. Moretto et al., Phys. Rev. Lett. 69, 1884, 1992.
[43] W. Bauer, G.F. Bertsch, and H. Schulz, Phys. Rev. Lett. 69, 1888, 1992; L. Phair,W. Bauer, and C.K. Gelbke, Phys. Lett. B314, 271, 1993.
[44] D. Gross, Bao-An Li and A.R. DeAngelis, Ann. Phys. 1, 467, 1992; Bao-An Li and D.H.E. Gross, Nucl. Phys. A554, 257, 1993.25
[45] B. Borderie et al., Phys. Lett. B302, 15, 1993.
[46] L.G. Moretto and G.J. Wozniak, Ann. Rev. Nucl. Part. Sci. 43, 123, 1993.
[47] M. Brack, C. Guet and H.-B Hakansson, Phys. Report. 123, 275, 1985.