Speaker
Description
Motivated by the updates of the ATLAS and CMS projections of Higgs pair production at the HL-LHC and the release of the Feasibility Study of the FCC-ee, we revisit the sensitivity of the global SMEFT analysis to deformations of the Higgs trilinear self-coupling $\lambda_3$.
We critically reassess the additional information that would be provided by the FCC-ee through NLO corrections to $Zh$ production.
To achieve this goal, we determine the correlation pattern between SMEFT operators modifying single and double Higgs production, quantify the impact of quadratic EFT corrections, and include Renormalisation Group Evolution (RGE) in all processes considered.
We use the SMEFiT framework in full power. Our analysis finds that, in light of the new projections for Higgs pair production,
single-operator and global marginalised determinations of $\lambda_3$ are very similar at LHC and HL-LHC, while there is a clear difference at FCC-ee.
We also study the implications of the improved $\lambda_3$ determination for benchmark UV-complete models matched to the SMEFT, specifically for the custodial electroweak quadruplets model.
Additionally, we review the impact of FCC-ee in several UV-complete models matched onto SMEFT. Based mostly on upcoming work.
