Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-02-17
Phys.Rev. D71 (2005) 115001
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 5 figures; minor typos corrected and references updated
Scientific paper
10.1103/PhysRevD.71.115001
In this note we calculate the form of electroweak corrections in deconstructed Higgsless models for the case of a fermion whose weak properties arise from two adjacent SU(2) groups on the deconstructed lattice. We show that, as recently proposed in the continuum, it is possible for the value of the electroweak parameter alpha S to be small in such a model. In addition, by working in the deconstructed limit, we may directly evaluate the size of off-Z-pole electroweak corrections arising from the exchange of Kaluza-Klein modes; this has not been studied in the continuum. The size of these corrections is summarized by the electroweak parameter alpha delta. In one-site delocalized Higgsless models with small values of alpha S, we show that the amount of delocalization is bounded from above, and must be less than 25% at 95% CL. We discuss the relation of these calculations to our previous calculations in deconstructed Higgsless models, and to models of extended technicolor. We present numerical results for a four-site model, illustrating our analytic calculations.
Chivukula Sekhar R.
He Hong-Jian
Kurachi Masafumi
Simmons Elizabeth H.
Tanabashi Masaharu
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