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A possibility of 5D gauge unification of $SU(2)_L \times U(1)_Y$ in $SU(3)_W$is examined. The orbifold compactification allows fixed points where$SU(2)_L\times U(1)_Y$ representations can be assigned. We present a fewpossibilities which give long proton lifetime, top-bottom mass hierarchy fromgeometry, and reasonable neutrino masses. In general, these {\it chiral models}can lead to fixed point anomalies. We can show easily, due to the simplicity ofthe model, that these anomalies are cancelled by the relevant Chern-Simonsterms for all the models we consider. It is also shown that the fixed pointU(1)--graviton--graviton anomaly cancels without the help from the Chern-Simonsterm. Hence, we conjecture that the fixed point anomalies can be cancelled ifthe effective 4D theory is made anomaly free by locating chiral fermions at thefixed points.Comment: LaTeX file of 19 pages with 1 figur

TeV scale 5D SU(3)Wunification and the fixed point anomaly cancellation with chiral split multiplets

TeV scale 5D SU(3)_Wunification and the fixed point anomaly cancellation with chiral split multiplets