INDUCED WZW-TYPE TERM IN DUAL FIELD THEORY
Niels Kjaer Nielsen · International Journal of Modern Physics A · 1990
One-loop quantum equivalence is investigated by proper time regularization for a nonlinear σ-model in two dimensions on a group manifold and its dual theory constructed by Fradkin and Tseytlin. The one-loop effective actions are found to deviate by a finite local counterterm with a structure similar to that of a Wess-Zumino-Witten term.