The Nappi-Witten example and gravitational waves
High Energy Physics - Theory
2007-05-23 v1
Abstract
The vanishing of the anomaly in the recent example of Nappi and Witten, constructed from the Wess-Zumino-Witten model based on a certain non-semisimple group, follows from a more general result valid for gravitational waves. The construction of the metric is explained.}
Cite
@article{arxiv.hep-th/9404018,
title = {The Nappi-Witten example and gravitational waves},
author = {C. Duval and Z. Horváth and P. A. Horváthy},
journal= {arXiv preprint arXiv:hep-th/9404018},
year = {2007}
}