Speaker: Prof. Stathes Paganis (NTU)
Talk title: How does the Higgs propagate?
Time: 2025/05/26 (Mon.) 12:30
Place: NCTS Physics 4F Lecture Hall, Cosmology Hall, NTU

Abstract: 
Thirteen years after the discovery of a single Higgs boson at the LHC, we have performed precision measurements that show that we have discovered a scalar particle fully consistent with the Standard Model Higgs. The SM itself does not predict the mass of the Higgs, so the mass is a purely experimental result that we do not understand, because any PT calculation of the Higgs self-energy, no matter how naïve, leads to an enormous correction of the physical mass in the Higgs propagator.

In this talk we will explore the most general possible scalar propagator and propose a BSM solution to the Hierarchy problem. We will discuss the Higgs-Higgs scattering at the LHC as a unique place to look for new physics, and exploit the HGCAL detector we are currently building in Taiwan to do so.

Finally, for effects on the Higgs propagator from "Dark Sectors", I will present a new quantum sensor we are producing in Taiwan to look for lower mass Dark Matter signals.