Vacuum Stability constraints on Universal Extra Dimensional Models in the light of Higgs Discovery and its impact on LHC search

Abstract

If the recently discovered new boson is confirmed to be a Higgsboson, thenstability of the electroweak vacuum in a minimal model with a universalextra dimension (mUED) willrequire a much lower cutoff for the theory than has been envisaged earlier.We show that this lowcutoff leads to important changes in much of the mUED phenomenology studiedtill now. In particular, prospects for LHC searches for n = 1, Kaluza Kleinstates are ratherlimited if conventional search strategies are used. We propose some newmethods which can overcome these difficulties.