The top quark mass and flavor mixing in a Seesaw model of Quark Masses

Abstract

The top quark mass and the flavor mixing are studied in the context of a Seesaw model of Quark Masses based on the gauge group $SU(2{)}_L\times SU(2{)}_R\times U(1)$. Six isosinglet quarks are introduced to give rise to the mass hierarchy of ordinary quarks. In this scheme, we reexamine a mechanism for the generation of the top quark mass. It is shown that, in order to prevent the Seesaw mechanism to act for the top quark, the mass parameter of its isosinglet partner must be much smaller than the breaking scale of $SU(2{)}_R$. As a result the fourth lightest up quark must have a mass of the order of the breaking scale of $SU(2{)}_R$, and a large mixing between the right-handed top quark and its singlet partner occurs. We also show that this mechanism is compatible with the mass spectrum of light quarks and their flavor mixing.

13 pgs. LaTeX form

Cited by in corpus (19)

• Leptonic CP violation
• Universal Seesaw Mass Matrix Model with an S_3 Symmetry
• CP Violation in Seesaw Model
• Building the full PMNS Matrix from six independent Majorana-type phases
• Quark mixings and flavor changing interactions with singlet quarks
• Universal Seesaw Mass Matrix Model with Three Light Pseudo-Dirac Neutrinos
• Leptogenesis and low energy CP phases with two heavy neutrinos
• Neutrino Masses and Mixings in a Universal Seesaw Mass Matrix Model
• Large Top Quark Yukawa Coupling and Horizontal Symmetries
• Evolution of the Yukawa coupling constants and seesaw operators in the universal seesaw model
• Quark sector CP violation of the universal seesaw model
• SO(10) \times SO(10) Universal Seesaw Model and its Intermediate Mass Scales
• A Unified Description of Quark and Lepton Mass Matrices in a Universal Seesaw Model
• Quark Seesaw, Dark $U(1)$ symmetry and Baryon-Dark Matter Coincidence
• A universal seesaw mechanism in five dimensions
• The third family quark mass hierarchy and FCNC in the universal seesaw model
• Coupling Constants Evolution in a Universal Seesaw Mass Matrix Model
• Effective theory for universal seesaw model and FCNC
• Flavour Physics and CP Violation in the Standard Model and Beyond