Higgs mechanism and bulk gauge boson masses in the Randall-Sundrum model -art. no. 045010

Assuming the breaking of gauge symmetries by the Higgs mechanism, we consid er the associated bulk gauge boson masses in the Randall-Sundrum background . With the Higgs field confined on the TeV-brane, the W and Z boson masses are naturally an order of magnitude smaller than their Kaluza-Klein excitat ion masses. The electroweak precision data require the lowest excited state to lie above about 30 TeV, with fermions on the TeV-brane. This hound is r educed to about 10 TeV if the fermions reside sufficiently close to the Pla nck-brane. Thus, some tuning of parameters is needed. We also discuss the b ulk Higgs case, where the bounds are an ol-del of magnitude smaller.