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Title

Search for pair production of Higgs bosons in the b b ¯ b b ¯ final state using proton-proton collisions at √s = 13 TeV with the ATLAS detector

CollaborationWith : Akilli, Ece / Amrouche, Cherifa Sabrina / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Della Volpe, Domenico / Di Bello, Francesco Armando / Dubreuil, Arnaud / Fawcett, William / Ferrere, Didier / Gadatsch, Stefan / Gadomski, Szymon / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Jansky, Roland / Katre, Akshay / Khoo, Teng Jian / Kiehn, Moritz / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nessi, Marzio / Pandini, Carlo / Paolozzi, Lorenzo / Salamani, Dalila / Schramm, Steven / Sfyrla, Anna / Sultan, D M S / Valente, Marco / Wu, Xin
Published in The journal of high energy physics. 2019, vol. 1901, 030
Collection Open Access - SCOAP3
Abstract A search for Higgs boson pair production in the b b ¯ b b ¯ final state is carried out with up to 36.1 fb −1 of LHC proton-proton collision data collected at √s = 13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to b b ¯ b b ¯ are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.
Keywords Hadron-Hadron scattering (experiments)
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arXiv: 1804.06174
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ATLAS COLLABORATION. Search for pair production of Higgs bosons in the b b ¯ b b ¯ final state using proton-proton collisions at √s = 13 TeV with the ATLAS detector. In: Journal of High Energy Physics, 2019, vol. 1901, p. 030. doi: 10.1007/JHEP01(2019)030 https://archive-ouverte.unige.ch/unige:113939

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Deposited on : 2019-02-07

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