Speakers
Description
The Higgs mechanism is a cornerstone of the Standard Model, and its self-coupling is a key parameter for experimental verification. Double-Higgs production provides tree-level sensitivity to the trilinear self-coupling and becomes measurable at sufficiently high center-of-mass energies. At 550 GeV in electron–positron collisions, the dominant channel is di-Higgs strahlung, with a smaller contribution from WW fusion. The latest ILD projections are derived from a 2016 full-simulation analysis, updated to include anticipated improvements in flavor tagging and kinematic reconstruction for event selection. This work presents an ongoing re-analysis using the SGV fast simulation of the ILD detector concept, including the full Standard Model background, and compares the projected sensitivity with the most recent results from the HL-LHC program.