Higgs and Effective Field Theory - HEFT 2025

Session

Future Colliders

5 Jun 2025, 16:00

503/1-001 - Council Chamber (CERN)

Conveners

Future Colliders

• Claudia Cornella

59. Accuracy Complements Energy: Impact of Electroweak Precision Tests on the Higgs Self-Coupling at FCC-ee

Victor Maura Breick (King's College London)

05/06/2025, 16:00

A Tera-Z factory, such as FCC-ee or CEPC, will have indirect sensitivity to heavy new physics up to the tens of TeV scale through higher-order loop contributions to precision measurements at the Z-pole. These provide complementary sensitivity to potential deviations from the Standard Model typically thought to best be constrained at leading order at higher energies above the Z-pole, leading to...

35. The Implications of a Large Electron Yukawa Modification

Benjamin Smith

05/06/2025, 16:20

The electron Yukawa coupling is among the smallest parameters in the Standard Model, making it highly sensitive to even the most modest new physics effects. A dedicated Higgs pole run at FCC-ee offers a potential avenue to directly measure this coupling, though with considerable experimental challenges. In this talk, I will explore the indirect phenomenological implications of modified lepton...

39. Scalars with non-decoupling phenomenology at future colliders

Graeme Crawford

05/06/2025, 16:40

The nature of electroweak symmetry breaking remains one of the last theoretical unknowns of the Standard Model. New physics which significantly alters EWSB from the SM prediction must be non-decoupling and does not admit a SMEFT expansion. In arXiv:2409.18177, we extend the SM with a spanning set of scalar electroweak multiplets that gain the majority of their mass via the Higgs mechanism....

8. New Physics contamination to precision luminosity measurements

Clara Lavinia Del Pio (Brookhaven National Lab)

05/06/2025, 17:00

The absolute machine luminosity is a crucial parameter for high-precision measurements at future colliders. Its determination relies on the precise prediction of the cross section of some reference process, which is calculated within the Standard Model (SM). It is therefore crucial to have under control the uncertainties induced by possible New Physics (NP) effects on this reference process....