A vector-like fourth generation with a discrete symmetry from Split-UED
A vector-like fourth generation with a discrete symmetry from Split-UED
Split-UED allows for the possibility that the lowest lying KK excitations of the Standard Model fermions can be much lighter than the corresponding gauge or Higgs KK states. This can happen provided the fermion bulk masses are chosen to be large, in units of the inverse compactification radius, 1/R, and …