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We consider gauge coupling unification in E6 F-Theory Grand Unified Theories(GUTs) where E6 is broken to the Standard Model (SM) gauge group using fluxes.In such models there are two types of exotics that can affect gauge couplingunification, namely matter exotics from the matter curves in the 27 dimensionalrepresentation of E6 and the bulk exotics from the adjoint 78 dimensionalrepresentation of E6. We explore the conditions required for either thecomplete or partial removal of bulk exotics from the low energy spectrum. Inthe latter case we shall show that (miraculously) gauge coupling unificationmay be possible even if there are bulk exotics at the TeV scale. Indeed in somecases it is necessary for bulk exotics to survive to the TeV scale in order tocancel the effects coming from other TeV scale matter exotics which would bythemselves spoil gauge coupling unification. The combination of matter and bulkexotics in these cases can lead to precise gauge coupling unification whichwould not be possible with either type of exotics considered by themselves. Thecombination of matter and bulk exotics at the TeV scale represents a unique andstriking signature of E6 F-theory GUTs that can be tested at the LHC.

Gauge Coupling Unification in E6 F-Theory GUTs with Matter and Bulk Exotics from Flux Breaking