Search for non-resonant Higgs boson pair production in the <i>bbl</i>ν<i>l</i>ν final state with the ATLAS detector in <i>pp</i> collisions at √<i>s</i>=13 TeV



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2918 more authors) (2020) Search for non-resonant Higgs boson pair production in the <i>bbl</i>ν<i>l</i>ν final state with the ATLAS detector in <i>pp</i> collisions at √<i>s</i>=13 TeV. PHYSICS LETTERS B, 801. 135145-.

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Abstract

A search for non-resonant Higgs boson pair production, as predicted by the Standard Model, is presented, where one of the Higgs bosons decays via the $H\rightarrow bb$ channel and the other via one of the $H \rightarrow WW^*/ZZ^*/\tau\tau$ channels. The analysis selection requires events to have at least two $b$-tagged jets and exactly two leptons (electrons or muons) with opposite electric charge in the final state. Candidate events consistent with Higgs boson pair production are selected using a multi-class neural network discriminant. The analysis uses 139 fb$^{-1}$ of $pp$ collision data recorded at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. An observed (expected) upper limit of 1.2 ($0.9^{+0.4}_{-0.3}$) pb is set on the non-resonant Higgs boson pair production cross-section at 95% confidence level, which is equivalent to 40 ($29^{+14}_{-9}$) times the value predicted in the Standard Model.

Item Type: Article
Additional Information: 38 pages in total, author list starting page 22, 3 figures, 5 tables, published in Phys. Lett. B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-33
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 13 Jan 2020 08:41
Last Modified: 07 Oct 2023 14:25
DOI: 10.1016/j.physletb.2019.135145
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3070423