O(d,d) invariance at two and three loops
High Energy Physics - Theory
2009-10-31 v2
Abstract
We show that in a two-dimensional sigma-model whose fields only depend on one target space co-ordinate, the O(d,d) invariance of the conformal invariance conditions observed at one loop is preserved at two loops (in the general case with torsion) and at three loops (in the case without torsion).
Cite
@article{arxiv.hep-th/9911064,
title = {O(d,d) invariance at two and three loops},
author = {I. Jack and S. Parsons},
journal= {arXiv preprint arXiv:hep-th/9911064},
year = {2009}
}
Comments
21 pages. Plain Tex. Uses Harvmac ("b" option). Revised Version with references added and minor errors corrected