The Weak Scale as a Trigger

26.02.2021 11:30 – 12:30

I discuss settings where the Higgs mass squared affects the vacuum expectation value of local operators and can thus act as a “trigger” of new cosmological dynamics. This triggering mechanism underlies several existing solutions to the hierarchy problem that traces the origin of the weak scale to the early history of the Universe. Thinking about these solutions more systematically from the point of view of weak scale triggers allows understanding their common predictions, finding new solutions, and identifying unexpected physics related to naturalness in a rather model-independent way. As an example, I discuss a BSM trigger in a Two Higgs Doublet Model and show how it can be used to link the tuning of the Higgs mass to that of the cosmological constant. This weak scale trigger demands the existence of new Higgs states necessarily comparable to or lighter than the weak scale, with no wiggle room to decouple them.

Lieu

Bâtiment: Ecole de Physique

Organisé par

Département de physique théorique

Intervenants

Raffaele Tito D'Agnolo , Institut de Physique Théorique, Saclay

entrée libre

Classement

Catégorie: Séminaire

Mots clés: Cosmology, dpt

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