Infinite-dimensional algebras in dimensionally reduced string theory

Details Infinite-dimensional algebras in dimensionally reduced string theory Infinite-dimensional algebras in dimensionally reduced string theory

1995-06-30

arxiv.org/abs/hep-th/9506205v1

Phys.Lett.B360:19-25,1995

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, Latex

Scientific paper

10.1016/0370-2693(95)01149-K

We examine 4-dimensional string backgrounds compactified over a two torus. There exist two alternative effective Lagrangians containing each two $SL(2)/U(1)$ sigma-models. Two of these sigma-models are the complex and the K\"ahler structures on the torus. The effective Lagrangians are invariant under two different $O(2,2)$ groups and by the successive applications of these groups the affine $\widehat{O}(2,2)$ Kac-Moody is emerged. The latter has also a non-zero central term which generates constant Weyl rescalings of the reduced 2-dimensional background. In addition, there exists a number of discrete symmetries relating the field content of the reduced effective Lagrangians.

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