On the Complementarity of F-theory, Orientifolds, and Heterotic Strings

Details On the Complementarity of F-theory, Orientifolds, and Heterotic Strings On the Complementarity of F-theory, Orientifolds, and Heterotic Strings

1998-03-20

arxiv.org/abs/hep-th/9803168v2

Nucl.Phys. B525 (1998) 73-103

Physics

High Energy Physics

High Energy Physics - Theory

36 pages, 4 eps figures, use harvmac and epsf. Typos corrected

Scientific paper

10.1016/S0550-3213(98)00344-7

We study F-theory duals of six dimensional heterotic vacua in extreme regions of moduli space where the heterotic string is very strongly coupled. We demonstrate how to use orientifold limits of these F-theory duals to regain a perturbative string description. As an example, we reproduce the spectrum of a $T^4/\ZZ_{4}$ orientifold as an F-theory vacuum with a singular $K3$ fibration. We relate this vacuum to previously studied heterotic $E_8\times E_8$ compactifications on $K3$.

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