Neutrality Effects on the Phase Structure of the Linear Sigma Model with the Non-standard Symmetry Breaking

Tran Huu Phat, Nguyen Van Long, Nguyen Van Thu
Author affiliations

Authors

  • Tran Huu Phat
  • Nguyen Van Long Gia Lai Junior College of Education
  • Nguyen Van Thu Department of Physics, Hanoi University of Education II and Institute for Nuclear Science and Technique

DOI:

https://doi.org/10.15625/0868-3166/22/3/2521

Abstract

The neutrality effects on the phase structure of the linear sigma model with the non-standard symmetry breaking term is systematically studied by means of the Cornwall-Jackiw-Tomboulis effective potential. The latter quantity is calculated in the improved Hartree-Fock approximation which preserves the Goldstone theorem and the thermodynamic consistency. Its results that in the region \(\mu > m_\pi\), as a function of the temperature \(T\), the pion condensate undergoes a second order phase transition, as a function of the isospin chemical \(\mu\), it undergoes a first order phase transition. In the region \(\mu < m_\pi\), the pion condensation is always a first order phase transition.

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Published

30-10-2012

How to Cite

[1]
T. H. Phat, N. V. Long and N. V. Thu, Neutrality Effects on the Phase Structure of the Linear Sigma Model with the Non-standard Symmetry Breaking, Comm. Phys. 22 (2012) 213. DOI: https://doi.org/10.15625/0868-3166/22/3/2521.

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Section

Papers
Published 30-10-2012

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