New vector bosons in the electroweak sector: a renormalizable model with decoupling
R. Casalbuoni, S. De Curtis, D. Dominici, M. Grazzini
Abstract
A linear realization of a model of dynamical electroweak symmetry breaking describing additional heavy vector bosons is proposed. The model is a SU(2)L x U(1) x SU(2)L' x SU(2)R' gauge theory, breaking at some high scale u to SU(2)weak x U(1)Y and breaking again in the standard way at the electroweak scale v to U(1)(em). The model is renormalizable and reproduces the Standard Model in the limit u infinity. This decoupling property is shown to hold also at the level of radiative corrections by computing, in particular, the epsilon parameters.
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