Gauge Theories on an Interval: Unitarity without a Higgs

  title={Gauge Theories on an Interval: Unitarity without a Higgs},
  author={C.Csaki and C.Grojean and H.Murayama and L.Pilo and J.Terning},
We consider extra dimensional gauge theories on an interval. We first review the derivation of the consistent boundary conditions (BC's) from the action principle. These BC's include choices that give rise to breaking of the gauge symmetries. The boundary conditions could be chosen to coincide with those commonly applied in orbifold theories, but there are many more possibilities. To investigate the nature of gauge symmetry breaking via BC's we calculate the elastic scattering amplitudes for… 
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