Influences of magnetic field on the coexistence of diquark and chiral condensates in the Nambu–Jona–Lasinio model with axial anomaly

Xiao-Bing Zhang(张小兵),Fu-Ping Peng(彭富平),Yun-Ben Wu(吴云奔),Yi Zhang(张一)

Figure 2. Phase diagram in the μ -$K^{\prime} $ plane for an intermediate magnetic field. The NG–BCS boundary is shown by a thick (black) solid line, which is a first-order transition for small $K^{\prime} $ . The emergence of BECI and BEC are shown by the thin (red) solid and dash–dotted (blue) lines, respectively. The BEC–BCS boundary is given by M  = μ and is shown as a dotted (black) line. The three critical points, Q 1, Q 2, and P, are explained in the text.