Unification with Enlarged Kaluza-Klein Dimensions

Details Unification with Enlarged Kaluza-Klein Dimensions Unification with Enlarged Kaluza-Klein Dimensions

1999-03-24

arxiv.org/abs/hep-ph/9903479v2

Phys.Lett. B460 (1999) 313-324

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, LaTeX, analysis for the susy case takes into account that extra hypermultiplets come in conjugate pairs, minor chang

Scientific paper

10.1016/S0370-2693(99)00819-9

In minimal theories with extra spatial dimensions at scales mu_0 much lower than the conventional GUT scale, unification can give too-large predictions for alpha_3(M_Z) given alpha_1(M_Z) and alpha_2(M_Z) 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 alpha_i(M_Z) are consistent with low-energy data. We study both the supersymmetric and nonsupersymmetric unification.

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