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We consider the ratio of cross sections of double-to-single Higgs bosonproduction at the Large Hadron Collider at 14 TeV. Since both processes possesssimilar higher-order corrections, leading to a cancellation of uncertainties inthe ratio, this observable is well-suited to constrain the trilinear Higgsboson self-coupling. We consider the scale variation, parton density functionuncertainties and conservative estimates of experimental uncertainties, appliedto the viable decay channels, to construct expected exclusion regions. We showthat the trilinear self-coupling can be constrained to be positive with a600/fb LHC dataset at 95% confidence level. Moreover, we demonstrate that weexpect to obtain a ~+30% and ~-20 uncertainty on the self-coupling at 3000/fbwithout statistical fitting of differential distributions. The present articleoutlines the most precise method of determination of the Higgs trilinearcoupling to date.

Higgs Boson self-coupling measurements using ratios of cross sections