Unconventional fermions: The Price of Quark-Lepton Unification at TeV Scales

Abstract

The early petite unification (PUT) of quarks and leptons at TeV scales with sin^2 theta_W(M^2_Z) used as a constraint, necessitates the introduction of extra quarks and leptons with unconventional electric charges (up to 4/3 for the quarks and 2 for the leptons). This talk, in honor of Paul Frampton's 60th birthday, will be devoted to the motivation and construction of models of early unification and to their implications, including the issues of rare decays and unconventional fermions.Comment: 10 pages, 2 figures. Talk in honor of Paul Frampton's 60th birthday given at the Coral Gables Conference on Launching of Belle Epoque in High Energy Physics and Cosmology, Ft. lauderdale, Florida, 17-21 December 2003. Added referenc