出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In five dimensional models of Higgsless electroweak symmetry breaking, tree level unitarity in
gauge boson scattering is restored by the exchange of gauge boson Kaluza-Klein modes instead of
a Higgs boson. Unitarity of scattering amplitudes involving top quarks requires also the Kaluza-
Klein modes of the third family quarks. It is shown that the relevant unitarity cancellations are
consistent with gauge symmetry breaking by boundary conditions. These results are used to
constrain the couplings of the top quark to Kaluza-Klein modes and the implications for collider
phenomenology are discussed.
