Unification with Enlarged Kaluza-Klein Dimensions
Paul H. Frampton, Andrija Rasin
Abstract
In minimal theories with extra spatial dimensions at scales mu0 much lower than the conventional GUT scale, unification can give too-large predictions for alpha3(MZ) given alpha1(MZ) and alpha2(MZ) as empirical input. We systematically study the effects of adding extra states above the compactification scale on running of the gauge couplings and find several simple examples that give unification where all alphai(MZ) are consistent with low-energy data. We study both the supersymmetric and nonsupersymmetric unification.
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