5D $SU(3{)}_W$ unification at TeV and cancellation of local gauge anomalies with split multiplets

Abstract

We consider the 5D gauge unification of $SU(2{)}_L\times U(1{)}_Y$ into $SU(3{)}_W$ at a TeV scale. Compactification of the extra dimension on an orbifold $S^1/(Z_2\times Z_2^{\prime })$ allows fixed points where $SU(2{)}_L\times U(1{)}_Y$ representations can be assigned. We explain the long proton lifetime and the top-bottom mass hierarchy and etc. geometrically. We also show that local gauge anomalies on the orbifold can be exactly cancelled by a 5D Chern-Simons term with a jumping coefficient.

LaTeX file of 3 pages, To be published in the proceedings of Summer Institute 2002, Fuji-Yoshida, Japan, 13-20 August 2002