A WZW model based on a non-semi-simple group

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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8 pages, phyzzx, IASSNS-HEP-93/61 Texable version

Scientific paper

10.1103/PhysRevLett.71.3751

We present a conformal field theory which desribes a homogeneous four dimensional Lorentz-signature space-time. The model is an ungauged WZW model based on a central extension of the Poincar\'e algebra. The central charge of this theory is exactly four, just like four dimensional Minkowski space. The model can be interpreted as a four dimensional monochromatic plane wave. As there are three commuting isometries, other interesting geometries are expected to emerge via $O(3,3)$ duality.

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