Speaker
Description
It is well known that unbroken global symmetries of the lagrangian remain unbroken under RG evolution. Less appreciated is the fact that certain relations can be RG-stable even without any symmetry transformation of the field content of the model. Recently, a renewed interest in this topic was sparked by the observation of a family of all-order RG-stable relations in the 2HDM scalar sector that cannot be generated by any usual symmetry. At present, opinions differ on how to understand this feature. It is also not known how to systematically discover such situations in other multi-Higgs models. In this talk, I will report a pragmatic numerical strategy that helps us identify such relations in a generic multi-scalar model, at least to one loop.