Dirichlet Higgs in extra-dimension, consistent with electroweak data

Understand

We propose a simple five-dimensional extension of the Standard Model (SM) without any Higgs potential nor any extra fields.

• A Higgs doublet lives in the bulk of a flat line segment and its boundary condition is Dirichlet at the ends of the line, which causes the electroweak symmetry breaking without Higgs potential.
• The vacuum expectation value of the Higgs is induced from the Dirichlet boundary condition which is generally allowed in higher dimensional theories.
• The lightest physical Higgs has non-flat profile in the extra dimension even though the vacuum expectation value is flat.