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Title

Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at √s = 13 TeV with the ATLAS detector

CollaborationWith : Akilli, Ece / 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 / Jansky, Roland / Katre, Akshay / Khoo, Teng Jian / Kiehn, Moritz / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Pandini, Carlo / Paolozzi, Lorenzo / Schramm, Steven / Sfyrla, Anna / Sultan, D M S / Valente, Marco / Wu, Xin
Published in Physical Review. D. 2018, vol. 97, no. 7
Collection Open Access - SCOAP3
Abstract A search for the standard model Higgs boson produced in association with a top-quark pair, tt¯H, is presented. The analysis uses 36.1 fb−1 of pp collision data at s=13 TeV collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search targets the H→bb¯ decay mode. The selected events contain either one or two electrons or muons from the top-quark decays, and are then categorized according to the number of jets and how likely these are to contain b-hadrons. Multivariate techniques are used to discriminate between signal and background events, the latter being dominated by tt¯+jets production. For a Higgs boson mass of 125 GeV, the ratio of the measured tt¯H signal cross-section to the standard model expectation is found to be μ=0.84−0.61+0.64. A value of μ greater than 2.0 is excluded at 95% confidence level (C.L.) while the expected upper limit is μ<1.2 in the absence of a tt¯H signal.
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arXiv: 1712.08895
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ATLAS COLLABORATION. Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at √s = 13 TeV with the ATLAS detector. In: Physical Review. D, 2018, vol. 97, n° 7. https://archive-ouverte.unige.ch/unige:104832

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Deposited on : 2018-06-01

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