Speaker
Description
Following the Higgs boson discovery in 2012 at the LHC, there has been an increased interest in the field of $e^+e^-$ collider physics suitable for performing precision measurements and testing the Standard Model (SM) in its limits. With the Higgs potential being characterised by the Higgs self-coupling, a model-independent measurement is crucial to either verify the SM mechaniscm for electroweak symmetry breaking sector or uncover new physics.
At future high-energy $e^+e^-$ colliders, the Higgs self-coupling can be directly accessed through the measurement of double Higgs boson production. The measurement is challenging due to the small production cross section and large multiplicity causing jets to overlap. Such challenges sets high standards on the analysis techniques and could sway which centre-of-mass energies to run at. Additionally, the possibility of new physics influences which channels might hold the better sensitivity.
In this contribution, we review the state-of-the-art of di-Higgs projections at future high-energy $e^+e^-$ colliders and give an outlook on how recent improvements in analysis techniques will impact the sensitivity, focusing on flavour-tagging, b-jet reconstruction, and kinematic fitting.
