Seminarium: Scalar kinetic mixing and the renormalisation group

Seminar in theoretical particle physics.

Models beyond the Standard Model, such as two Higgs Doublet Models, can have multiple scalar fields with the same quantum numbers giving rise to so called kinetic mixing. In this talk, I will discuss how this kinetic mixing can be treated under renormalisation and show that by choosing an appropriate renormalisation scheme, one can avoid kinetic mixing also at one-loop level. I will also briefly discuss the consequences for two Higgs Doublet Models.