Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-11-10
Phys.Rev. D62 (2000) 026003
Physics
High Energy Physics
High Energy Physics - Theory
21 pages. Plain Tex. Uses Harvmac ("b" option). Revised Version with references added and minor errors corrected
Scientific paper
10.1103/PhysRevD.62.026003
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).
Jack Ian
Parsons Sid
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