Kaluza-Klein decomposition and gauge coupling unification in orbifold GUTs

Abstract

We discuss Kaluza-Klein (KK) decomposition in 5-dimensional (5D) field theories with orbifold compactification. Kinetic terms localized at orbifold fixed points, which are inevitably present in any realistic model, modify the standard KK mass spectrum and interactions of KK modes. This, in turn, can significantly affect phenomenology of the orbifold models. As an example, we discuss gauge coupling unification in N=1 supersymmetric 5D orbifold SU(5) model. We have found that uncertainties in the predictions of the model related to modification of the KK masses are large and essentially uncontrollable.

arXiv comment20 pages, tcilatex, no figures; V2 - typos corrected and references added

Cited by in corpus (8)

• Bulk fields with general brane kinetic terms
• Brane Localized Curvature for Warped Gravitons
• Higher derivatives and brane-localised kinetic terms in gauge theories on orbifolds
• Dependence of SU(N) coupling behavior on the size of extra dimensions
• Gauge-Higgs unification with brane kinetic terms
• Gauge and Yukawa couplings in 6D supersymmetric SU(6) models
• Low energy kinetic distribution on orbifolds
• Boundary Localized Symmetry Breaking and Topological Defects