Classical Renormalization of Codimension-two Brane Couplings

Understand

The curvature on codimension-two and higher branes is not regular for arbitrary matter sources.

• Nevertheless, the low-energy theory for an observer on such a brane should be well-defined and independent to any regularization procedure.
• This is achieved via appropriate classical renormalization of the brane couplings, and leads to a natural hierarchy between standard model couplings and couplings to gravity.