Quark Self-Energy and Condensates in NJL Model with External Magnetic Field

Abstract

In a one-flavor NJL model with a finite temperature, chemical potential, and external magnetic field, the self-energy of the quark propagator contains more condensates besides the vacuum condensate. We use Fierz identity to identify the self-energy and propose a self-consistent analysis to simplify it. It turns out that these condensates are related to the chiral separation effect and spin magnetic moment.

Keywords

• NJL model
• external magnetic field
• chiral symmetry breaking
• dynamical mass
• gap equations
• self-energy