Deconstruction, G2 Holonomy, and Doublet-Triplet Splitting
Edward Witten
Abstract
We describe a mechanism for using discrete symmetries to solve the doublet-triplet splitting problem of four-dimensional supersymmetric GUT's. We present two versions of the mechanism, one via ``deconstruction,'' and one in terms of M-theory compactification to four dimensions on a manifold of G2 holonomy.
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