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arXiv · hep-ph/0607124

A Three Site Higgsless Model

R. Sekhar Chivukula·Baradhwaj Coleppa·Stefano Di Chiara·Hong-Jian He·Masafumi Kurachi·Elizabeth H. Simmons·Masaharu Tanabashi
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Abstract

We analyze the spectrum and properties of a highly-deconstructed Higgsless model with only three sites. Such a model contains sufficient complexity to incorporate interesting physics issues related to fermion masses and electroweak observables, yet remains simple enough that it could be encoded in a Matrix Element Generator program for use with Monte Carlo simulations. The gauge sector of this model is equivalent to that of the BESS model; the new physics of interest here lies in the fermion sector. We analyze the form of the fermion Yukawa couplings required to produce the ideal fermion delocalization that causes tree-level precision electroweak corrections to vanish. We discuss the size of one-loop corrections to b \to s γ, the weak-isospin violating parameter αT and the decay Z \to b \bar{b}. We find that the new fermiophobic vector states (the analogs of the gauge-boson KK modes in a continuum model) can be reasonably light, with a mass as low as 380 GeV, while the extra (approximately vectorial) quark and lepton states (the analogs of the fermion KK modes) must be heavier than 1.8 TeV.

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R. Sekhar Chivukula, Baradhwaj Coleppa, Stefano Di Chiara, Hong-Jian He, Masafumi Kurachi, Elizabeth H. Simmons, Masaharu Tanabashi. 2006-10-19. A Three Site Higgsless Model. https://doi.org/10.1103/physrevd.74.075011

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