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Unified Models at Intermediate Energy Scales and Kaluza-Klein Excitations

G. K. Leontaris, N. D. Tracas

hep-pharXiv:hep-ph/9908462

Abstract

We discuss the possibility of intermediate gauge coupling unification in unified models of string origin. Useful relations of the β-function coefficients are derived, which ensure unification of couplings when Kaluza--Klein excitations are included above the compactification scale. We apply this procedure to two models with SU(3)× SU(3)L× SU(3)R and SU(4)× O(4) gauge symmetries.

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