The Standard Model of particle physics, despite its amazing success, is in need of an extension to describe nature at high scales. One class of proposals for such an extension are field theories with extra dimensions. Many of these models have attractive features like stable dark matter candidates, promising at least partial answers to natures questions.

Our focus lies with investigating the impact radiative corrections have on the phenomenology of the Universal Extra Dimensions (UED) model and the subsequent discovery potential at e.g. Hadron colliders. We study in detail the Next-to-Leading-Order corrections to the pair production of heavy vector color-octets, as they typically appear in such models. Additionally, we discuss how a variation of the cutoff scale influences this result. This is of particular importance since this a priori unknown scale represents a large source of uncertainty.

Subsequently we investigate radiatively induced operators for the entire Standard Model formulated in UED, particularly the impact they have on the degenerate mass spectrum and KK-number violating decays. This allows us to derive bounds from both indirect searches and directly detectable new physics signals.