Testing Naturalness at 100 TeV

by Dr Jan Hajer (UCL)

Thursday 11 Jan 2018, 13:00 → 14:00 Europe/Brussels

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

Solutions to the electroweak hierarchy problem typically introduce a new symmetry to stabilize the quadratic ultraviolet sensitivity in the self-energy of the Higgs boson. In order to describe the physics of the SM the new symmetry must be broken. At low energies this leads to naturalness partners for the Standard Model fields which are responsible for canceling the quadratic divergence in the squared Higgs mass. Using the fermionic top partners in little Higgs theories as an illustration, I will construct a simplified model for naturalness and demonstrate how to test this cancellation by measuring couplings between the Higgs and the new top partner like particle once they have been discovered.

Transparents naturalness.pdf