The Effective Action of $W_3$ Gravity to All Orders

Details The Effective Action of $W_3$ Gravity to All Orders The Effective Action of $W_3$ Gravity to All Orders

1992-11-24

arxiv.org/abs/hep-th/9211107v1

Nucl.Phys. B401 (1993) 348-368

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, THU-92/33

Scientific paper

10.1016/0550-3213(93)90307-B

The effective action for chiral $W_3$ gravity is studied. It is shown that the computation of the effective action can be reduced to that of a $SL(3,\re)$ Wess-Zumino-Witten theory. If one assumes that the effective action for the Wess-Zumino-Witten model is identical to the WZW action up to multiplicative renormalizations, then the effective action for $W_3$ gravity is, to all orders, given by a constrained WZW model. The multiplicative renormalization constants of the WZW model are discussed and it is analyzed which particular values of these constants are consistent with previous one-loop calculations, and which reproduce the KPZ formulas for gravity and their generalizations for $W_3$ gravity.

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