Electroweak Precision Test and in the Three Site Higgsless Model

The three site Higgsless model is a highly-deconstructed Higgsless model with only three sites. In this model, we show that the KK gauge boson mass, KK fermion mass, and the KK gauge boson couplings with light quarks and leptons are severely constrained by the electroweak precision data. Especially we find that perfect fermiphobity of KK gauge boson is ruled out by the precision data. We also compute the flavor dependent chiral logarithmic corrections to the decay . We find that the phenomenological constraints on this model arising from measurements of are relatively mild, requiring only that the heavy Dirac fermion be heavier than 1 TeV or so, and are satisfied automatically in the range of parameters allowed by the electroweak precision data.