Abstract: |
While we have always lived with the naturalness issues of a fundamental scalar at the electroweak scale, almost all the attempts to solve it are top-down in nature: we assume some dynamics at a high energy scale which softens (or removes) the fine-tuning problem and then explore its consequences. However, if we do not find any new physics at the LHC, we might like to reframe the question and try a bottom-up approach: if Higgs mass fine-tuning is indeed resolved by some unknown dynamics, what might be its nature? In this talk, I would show where the fine-tuning problem leads us, and discuss the implications in three of the popular extensions of the scalar sector of the Standard Model. If time permits, I will also discuss about constraints on higher- dimensional operators involving the Higgs boson from an effective theory approach. |