Journal
PHYSICAL REVIEW D
Volume 81, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.81.055014
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan [16081211]
- Natural Sciences and Engineering Research Council of Canada
- Grants-in-Aid for Scientific Research [16081211] Funding Source: KAKEN
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Recently, a new class of models describing the quark mass hierarchy has been introduced. In this class, while the t quark plays a minor role in electroweak symmetry breaking, it is crucial in providing the quark mass hierarchy. In this paper, we analyze the dynamics of a particular model in this class, in which the b' and t' quarks of the fourth family are mostly responsible for dynamical electroweak symmetry breaking. The low energy effective theory in this model is derived. It has a clear signature, a 2 + 1 structure of composite Higgs doublets: two nearly degenerate Phi(b') similar to (b) over bar (R)'(t',b')(L) and Phi(t') similar to (t) over bar (R)'(t',b')(L), and a heavier top-Higgs resonance Phi(t') similar to (t) over bar (R)'(t,b)(L). The properties of these composites are described in detail, and it is shown that the model satisfies the electroweak precision data constraints. The signatures of these composites at the Large Hadron Collider are briefly discussed.
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