Non-critical Heterotic Superstrings in Various Dimensions
arXiv:hep-th/0603121 · doi:10.1088/1126-6708/2006/10/037
Abstract
We construct heterotic string theories on spacetimes of the form R^{d-1,1} times N=2 linear dilaton, where d=6,4,2,0. There are two lines of supersymmetric theories descending from the two supersymmetric ten-dimensional heterotic theories. These have gauge groups which are lower rank subgroups of E_{8} times E_{8} and SO(32). On turning on a (2,2) deformation which makes the two dimensional part a smooth SL_{2}(R)/U(1) supercoset, the gauge groups get broken further. In the deformed theories, there are non-trivial moduli which are charged under the surviving gauge group in the case of d=6. We construct the marginal operators on the worldsheet corresponding to these moduli.
27 pages, harvmac. v2 reference added
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