9th General Meeting of the LHC EFT Working Group

Probing H$\tau$$\tau$ Coupling and CP properties at FCC-ee

Not scheduled

20m

4/3-006 - TH Conference Room (CERN)

Speaker

Sofia Giappichini (KIT - Karlsruhe Institute of Technology (DE))

Description

The Future Circular Collider (FCC-ee), a key pillar of the European Strategy for Particle Physics, offers unprecedented precision for studying the Higgs boson. The decay $H \to \tau\tau$ stands out due to its sizable branching ratio, clean experimental environment, and sensitivity to tau polarization, making it an ideal channel to probe the CP properties of the Yukawa couplings and search for signs of CP violation beyond the Standard Model. We highlight the prospects for measuring CP-odd components in $H \to \tau\tau$ decays through angular and polarization observables in associated ZH production at a center-of-mass energy of 240 GeV within an Effective Field Theory framework. Additionally, we briefly discuss the broader electroweak precision program at FCC-ee, which will probe new physics indirectly through precision measurements across the different planned runs.