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


de Lima, Danilo Enoque Ferreira; Papaefstathiou, Andreas; Spannowsky, Michael (2014). Standard model Higgs boson pair production in the (b ̄b)(b ̄b) final state. Journal of High Energy Physics:030.

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 ()() 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.

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 ()() 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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2014
Deposited On:05 Feb 2015 09:58
Last Modified:26 Sep 2017 13:43
Publisher:Springer
ISSN:1029-8479
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP08(2014)030

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