Standard model Higgs boson pair production in the (bb)(bb)final state

Abstract

Abstract: Measuring the Higgs boson couplings as precisely as possible is one of the major goals of the High Luminosity LHC. We show that the (formula present)final state in Higgs boson pair production can be exploited in the boosted regime to give constraints on the trilinear Higgs boson self-coupling. In these exclusive phase space regions, novel jet substructure techniques can be used to separate the signal from the large QCD and electroweak backgrounds. New developments on trigger and b-tagging strategies for the upcoming LHC runs are necessary in order to reconstruct the Higgs bosons in boosted final states, where the trilinear self-coupling sensitivity is reduced. We find that using our approach one can set a limit for λ ≤ 1.2 at 95% CL after 3000 fb −1. As the signal-to-background ratio is small, we propose a data-driven side-band analysis to improve on the coupling measurement.