A Non-Perturbative Superpotential With E8 Symmetry
R. Donagi, A. Grassi, E. Witten
Abstract
We compute the non-perturbative superpotential in F-theory compactification to four dimensions on a complex three-fold ¶1× S, where S is a rational elliptic surface. In contrast to examples considered previously, the superpotential in this case has interesting modular properties; it is essentially an E8 theta function.
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