un 1 99 8 Parity breaking in 2 + 1 dimensions and finite temperature
نویسنده
چکیده
The effective action of 2+1 dimensional fermions at finite temperature in an arbitrary background is computed at leading order in a covariant gradient expansion using the ζ-function regularization. The parity anomaly is shown to be temperature independent. An explicit closed form is given for the parity anomalous component of the effective action. The result checks the correct behavior under gauge and parity transformations and reproduces known results for particular cases. Its connection with chiral symmetry is discussed.
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