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Split-UED allows for the possibility that the lowest lying KK excitations ofthe Standard Model fermions can be much lighter than the corresponding gauge orHiggs KK states. This can happen provided the fermion bulk masses are chosen tobe large, in units of the inverse compactification radius, 1/R, and negative.In this setup, all of the other KK states would be effectively decoupled fromlow energy physics. Such a scenario would then lead to an apparent vector-likefourth generation with an associated discrete symmetry that allows us toaccommodate a dark matter candidate. In this paper the rather uniquephenomenology presented by this picture will be examined.

A vector-like fourth generation with a discrete symmetry from Split-UED