Standard Model Higgs boson pair production in the $(b\bar{b})(b\bar{b})$ final state

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 $(b\bar{b})(b\bar{b})$ 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 $\lambda \le 1.2$ at $95\%$ CL after $3000{\mathrm{fb}}^{-1}$. As the signal-to-background ratio is small we propose a data-driven side-band analysis to improve on the coupling measurement.

19 pages, 9 figures, matches published JHEP version

References in corpus (3)

• Herwig++ Physics and Manual
• Jet substructure as a new Higgs search channel at the LHC
• Yukawa radiative corrections to the trilinear self-couplings of neutral CP-even Higgs bosons and decay width $\Gamma (H\to hh)$ in the MSSM

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