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Title

Search for Higgs boson pair production in the γ γ b b ¯ $$ \upgamma \upgamma b\overline{b} $$ final state with 13 TeV pp collision data collected by the ATLAS experiment

CollaborationWith : Akilli, Ece / Amrouche, Cherifa Sabrina / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Fawcett, William / Ferrere, Didier / Gadatsch, Stefan / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Iizawa, Tomoya / Jansky, Roland / Khoo, Teng Jian / Kiehn, Moritz / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nessi, Marzio / Paolozzi, Lorenzo / Poggi, Riccardo / Raine, Johnny / Salamani, Dalila / Schramm, Steven / Sfyrla, Anna / Sultan, D M S / Valente, Marco / Vicente Barreto Pinto, Mateus / Wu, Xin / Zaffaroni, Ettore
Published in Journal of High Energy Physics. 2018, vol. 1811, p. 040
Collection Open Access - SCOAP3
Abstract A search is performed for resonant and non-resonant Higgs boson pair production in the γ γ b b ¯ $$ \upgamma \upgamma b\overline{b} $$ final state. The data set used corresponds to an integrated luminosity of 36.1 fb −1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No significant excess relative to the Standard Model expectation is observed. The observed limit on the non-resonant Higgs boson pair cross-section is 0.73 pb at 95% confidence level. This observed limit is equivalent to 22 times the predicted Standard Model cross-section. The Higgs boson self-coupling ( κ λ = λ HHH / λ HHH SM ) is constrained at 95% confidence level to −8.2 < κ λ < 13.2. For resonant Higgs boson pair production through X → H H → γ γ b b ¯ $$ X\to HH\to \upgamma \upgamma b\overline{b} $$ , the limit is presented, using the narrow-width approximation, as a function of m X in the range 260 GeV < m X < 1000 GeV. The observed limits range from 1.1 pb to 0.12 pb over this mass range.
Keywords Hadron-Hadron scattering (experiments)Higgs physics
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arXiv: 1807.04873
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ATLAS COLLABORATION. Search for Higgs boson pair production in the γ γ b b ¯ $$ \upgamma \upgamma b\overline{b} $$ final state with 13 TeV pp collision data collected by the ATLAS experiment. In: Journal of High Energy Physics, 2018, vol. 1811, p. 040. https://archive-ouverte.unige.ch/unige:111800

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Deposited on : 2018-12-04

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