Quark-Lepton Flavor Democracy and the Non-Existence of the Fourth Generation

Abstract

In the Standard Model with two Higgs doublets (type II), which has a consistent trend to a flavor gauge theory and its related flavor democracy in the quark and the leptonic sectors (unlike the minimal Standard Model) when the energy of the probes increases, we impose the mixed quark-lepton flavor democracy at high ``transition'' energy and assume the usual see-saw mechanism, and consequently find out that the existence of the fourth generation of fermions in this framework is practically ruled out.

arXiv comment12 pages, (4 figures available upon request), DO-TH-94-09, YUMS 94-10, SNUTP 94-35

References in corpus (1)

• Flavor Democracy in Standard Models at High Energies

Cited by in corpus (3)

• Fourth generation effects in rare exclusive B -> K^* l^+ l^- decay
• Charged fermion masses with Yukawa coupling strength universality
• Generating the Cabibbo Angle in Flavored Gauge Mediation Models with Discrete Non-Abelian Symmetries