Bulk Higgs with 4D Gauge Interactions

Details Bulk Higgs with 4D Gauge Interactions Bulk Higgs with 4D Gauge Interactions

2005-07-14

arxiv.org/abs/hep-th/0507130v1

Phys.Lett. B628 (2005) 262-274

Physics

High Energy Physics

High Energy Physics - Theory

16 pages

Scientific paper

10.1016/j.physletb.2005.09.064

We consider a model with an extra compact dimension in which the Higgs is a bulk field while all other Standard Model fields are confined on a brane. We find that four-dimensional gauge invariance can still be achieved by appropriate modification of the brane action. This changes accordingly the Higgs propagator so that, the Higgs, in all its interactions with Standard Model fields, behaves as an ordinary 4D field, although it has a bulk kinetic term and bulk self-interactions. In addition, it cannot propagate from the brane to the bulk and, thus, no charge can escape into the bulk but it remains confined on the brane. Moreover, the photon remains massless, while the dependence of the Higgs vacuum on the extra dimension induces a mixing between the graviphoton and the Z-boson. This results in a modification of the sensitive \rho-parameter.

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