Dynamical chiral symmetry breaking in the NJL model with a constant external magnetic field

  title={Dynamical chiral symmetry breaking in the NJL model with a constant external magnetic field},
  author={Song Shi and You-chang Yang and Yong-hui Xia and Zhu-fang Cui and Xiao-jun Liu and Hongshi Zong},
  journal={Physical Review D},
In this paper, we develop a new method that is different from the Schwinger proper time method to deduce the fermion propagator with a constant external magnetic field. In the NJL model, we use this method to find the gap equation at zero and nonzero temperature and give the numerical results and phase diagram between the magnetic field and temperature. Additionally, we introduce the current mass to study the susceptibilities because there is a new parameter (the strength of the external… 
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