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Toroidal compactification of heterotic 6D non-critical strings down to four dimensions. (English) Zbl 0925.81239
Summary: The low-energy limit of the 6D non-critical string theory with $$N=1$$ SUSY and $$E_8$$ chiral current algebra compactified on $$T^2$$ is generically an $$N=2$$ U(1) vector multiplet. We study the analog of the Seiberg-Witten solution for the low-energy effective action as a function of $$E_8$$ Wilson lines on the compactified torus and the complex modulus of that torus. The moduli space includes regions where the Seiberg-Witten curves for SU(2) QCD are recovered as well as regions where the newly discovered 4D theories with enhanced $$E_{6,7,8}$$ global symmetries appear.

##### MSC:
 81T30 String and superstring theories; other extended objects (e.g., branes) in quantum field theory 83E30 String and superstring theories in gravitational theory
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