Abstrak	Kembali
An Abelian gauge theory with a Chern–Simons (CS) term is investigated for a four-component Dirac fermion in 1 + 2 dimensions. The Ball–Chiu (BC) vertex function is employed to modify the rainbow-ladder approximation for the Schwinger–Dyson (SD) equation. We numerically solve the SD equation and show the gauge dependence for the resulting phase boundary for the parity and the chiral symmetry.