Electromagnetic contributions to lepton g−2 in a thick brane-world

We consider Standard Model fields living inside a thick four-dimensional flat brane embedded in a (possibly warped) five-dimensional space–time and estimate the electromagnetic corrections to the anomalous magnetic moment (g−2) of the electron and muon by including virtual massive fermion and gauge boson states. Constraints on the mass of the “excited” states (or thickness of the brane-world) are obtained.