Induced parity-breaking term at finite chemical potential and temperature - art. no. 105015

We exactly calculated the parity-odd term of the effective action induced b y the fermions in 2 + 1 dimensions at finite chemical potential and finite temperature for a special class of gauge field background. It shows that ga uge invariance is still respected. A more general class of background confi gurations is also considered. The knowledge of the reduced 1 + 1 determinan t is required in order to draw; exact conclusions about the gauge invarianc e of the parity-odd term in this latter case. [S0556-2821(99)01018-8].