Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-08-28
Phys.Lett.B658:57-63,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 7 figures
Scientific paper
10.1016/j.physletb.2007.10.042
We discuss a scenario consisting of an effective 4D theory containing fundamental and composite fields. The strong dynamics sector responsible for the compositeness is assumed to be of extra dimensional origin. In the 4D effective theory the SM fermion and gauge fields are taken as fundamental fields. The scalar sector of the theory resembles a bosonic topcolor in the sense there are two scalar Higgs fields, a composite scalar field and a fundamental gauge-Higgs unification scalar. A detailed analysis of the scalar spectrum is presented in order to explore the parameter space consistent with experiment. It is found that, under the model assumptions, the acceptable parameter space is quite constrained. As a part of our phenomenological study of the model, we evaluate the branching ratio of the lightest Higgs boson and find that our model predicts a large FCNC mode h -> tc, which can be as large as O(10^{-3}). Similarly, a large BR for the top FCNC decay is obtained, namely B.R.(t -> c + H) \simeq 10^{-4}
Aranda Alfredo
Diaz-Cruz Lorenzo J.
Hernandez-Sanchez Jaime
Noriega-Papaqui R.
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