A heavy Higgs boson from flavor and electroweak symmetry breaking unification

Details A heavy Higgs boson from flavor and electroweak symmetry breaking unification A heavy Higgs boson from flavor and electroweak symmetry breaking unification

2004-07-30

arxiv.org/abs/hep-ph/0407358v1

Phys.Rev. D70 (2004) 115008

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages

Scientific paper

10.1103/PhysRevD.70.115008

We present a unified picture of flavor and electroweak symmetry breaking based on a nonlinear sigma model spontaneously broken at the TeV scale. Flavor and Higgs bosons arise as pseudo-Goldstone modes. Explicit collective symmetry breaking yields stable vacuum expectation values and masses protected at one loop by the little-Higgs mechanism. The coupling to the fermions generates well-definite mass textures--according to a U(1) global flavor symmetry--that correctly reproduce the mass hierarchies and mixings of quarks and leptons. The model is more constrained than usual little-Higgs models because of bounds on weak and flavor physics. The main experimental signatures testable at the LHC are a rather large mass m_{h^0} = 317\pm 80 GeV for the (lightest) Higgs boson and a characteristic spectrum of new bosons and fermions at the TeV scale.

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