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Abstract: I will first recall the electroweak hierarchy problem, as well as the general concepts of naturalness and of near criticality of the Higgs potential as an alternative path to confront that problem. Within the near-criticality framework, the smallness of the Higgs mass may be a byproduct of the metastability of the Higgs potential. Strong bounds on the Higgs mass result in all generality provided there is new viable physics capable of lowering the scale at which the Higgs quartic coupling turns negative. The new physics scale is then be within reach of future experiments including future colliders such as the FCC. As a concrete and ultraviolet-complete realisation, I will explore the low-scale Majoron model of neutrino masses, although the Higgs mass bounds and predictions resulting from ALP theories will also be briefly discussed.
- Meeting ID: 990 0750 0353
- Passcode: 506030