Garchinger Maier-Leibnitz-Kolloquium: An Unconventional Approach to the Hierarchy Problem

by Dr Emanuele Gendy (Physik Department T75, TUM)

Thursday 25 Jan 2024, 16:15 → 17:15 Europe/Berlin

Lecture Hall, ground floor (west) (LMU building, Am Coulombwall 1, campus Garching)

The electroweak hierarchy problem and the naturalness framework have been a driving theme for model building beyond the Standard Model of particle physics. In the case of the Higgs boson, the problem lies in the difficulty of producing a model where the Higgs mass is insensitive to parameters in the ultraviolet (UV) completed theory. With time, more traditional solutions to the hierarchy problem, like supersymmetry or extra dimensions have given room to more daring approaches. As a proof of concept, we describe a model where the one-loop corrections to the mass of a scalar field cancel exactly, thus rendering it UV-insensitive. This is achieved by introducing a symmetry that generalizes SU(N) by adding fermionic generators. The price to pay, however, is the introduction of degrees of freedom with the wrong spin-statistics, with severe implications for unitarity.

Hybrid access via ZOOM:
https://lmu-munich.zoom.us/j/98457332925?pwd=TWc3V1JkSHpyOTBPQVlMelhuNnZ1dz09
Meeting ID: 984 5733 2925
Passcode: 979953

kolloquium-25-01-24.pdf