Speaker
Description
A parameter of major interest in particle physics which has not yet been precisely measured is the Higgs self-coupling. A precise measurement of this coupling is fundamental to the Standard Model (SM), as it has a direct impact on the shape of the Higgs potential. A measurement consistent with the SM would further bolster the accuracy of the SM and confirm the expected meta-stability of the Higgs vacuum, while a measurement which disagrees could hint at the existence of new particles. While the Higgs self-coupling cannot be directly measured at FCC-ee due to a collision energy too low for HH production, it can be indirectly measured via single Higgs production. This talk will present projected constraints on the Higgs self-coupling using the fully-hadronic ZH process, taking advantage of the high ZH→hadrons branching ratio and the clean 𝑒+𝑒− collision environment.
