Dynamics behind the quark mass hierarchy

Details Dynamics behind the quark mass hierarchy Dynamics behind the quark mass hierarchy

2009-01-28

arxiv.org/abs/0901.4354v2

Phys.Rev.D80:013004,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 figures, v2: title shorten, references and 1 figure added, text essentially extended, PRD version

Scientific paper

10.1103/PhysRevD.80.013004

We introduce a new class of models describing the quark mass hierarchy. In this class, the dynamics primarily responsible for electroweak symmetry breaking (EWSB) leads to the mass spectrum of quarks with no (or weak) isospin violation. Moreover, the values of these masses are of the order of the observed masses of the down-type quarks. Then, strong (although subcritical) horizontal diagonal interactions for the $t$ quark plus horizontal flavor-changing neutral interactions between different families lead (with no fine tuning) to a realistic quark mass spectrum. In this scenario, many composite Higgs bosons occur. A concrete model with the dynamical EWSB with the fourth family is described in detail.

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