Lepton flavour violation in RS models with a brane- or nearly brane-localized Higgs

Understand

We perform a comprehensive study of charged lepton flavour violation in Randall-Sundrum (RS) models in a fully 5D quantum-field-theoretical framework.

• We consider the RS model with minimal field content and a "custodially protected" extension as well as three implementations of the IR-brane localized Higgs field, including the non-decoupling effect of the Kaluza-Klein (KK) excitations of a narrow bulk Higgs.
• Our calculation provides the first complete result for the flavour-violating electromagnetic dipole operator in Randall-Sundrum models.
• It contains three contributions with different dependence on the magnitude of the anarchic 5D Yukawa matrix, which can all be important in certain parameter regions.