2009/12/31 by Michio Hashimoto, V. A. Miransky · 35 citations
Computer Science · Mathematics · Physics and Astronomy · #Computational Physics and Python Applications #Cosmology and Gravitation Theories #Electroweak interaction #Geometry #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Symmetry (geometry) #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.81.055014
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 81(5) (American Physical Society) · 17 pages, 3 figures; v.2: references and clarifications added: PRD version
arxiv created 2010/03/31 · openalex publication_date 2010/03/31 · arxiv updated 2010/04/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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^\ensuremath' and t^\ensuremath' 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 \ensuremathΦ_b^\ensuremath'\ensuremath∼bR^\ensuremath'(t^\ensuremath',b^\ensuremath')L and \ensuremathΦ_t^\ensuremath'\ensuremath∼tR^\ensuremath'(t^\ensuremath',b^\ensuremath')L, and a heavier top-Higgs resonance \ensuremathΦt\ensuremath∼tR(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.