Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/115205
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Type: Journal article
Title: Search for the Standard Model Higgs boson decaying into bb¯ produced in association with top quarks decaying hadronically in pp collisions at √s = 8 TeV with the ATLAS detector
Other Titles: Search for the Standard Model Higgs boson decaying into bb -bar produced in association with top quarks decaying hadronically in pp collisions at root s = 8 TeV with the ATLAS detector
Author: The ATLAS Collaboration
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
Abolins, M.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
et al.
Citation: Journal of High Energy Physics, 2016; 2016(5):160-1-160-15
Publisher: Springer-Verlag
Issue Date: 2016
ISSN: 1126-6708
1029-8479
Statement of
Responsibility: 
The ATLAS collaboration, G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... M.J. White ... et al.
Abstract: A search for Higgs boson production in association with a pair of top quarks (tt¯H) is performed, where the Higgs boson decays to bb¯, and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb⁻¹ of pp collisions at s√=8 TeV collected with the ATLAS detector at the Large Hadron Collider. The search selects events with at least six energetic jets and uses a boosted decision tree algorithm to discriminate between signal and Standard Model background. The dominant multijet background is estimated using a dedicated data-driven technique. For a Higgs boson mass of 125 GeV, an upper limit of 6.4 (5.4) times the Standard Model cross section is observed (expected) at 95% confidence level. The best-fit value for the signal strength is μ = 1.6 ± 2.6 times the Standard Model expectation for m H = 125 GeV. Combining all tt¯H searches carried out by ATLAS at s√=8 and 7 TeV, an observed (expected) upper limit of 3.1 (1.4) times the Standard Model expectation is obtained at 95% confidence level, with a signal strength μ = 1.7 ± 0.8.
Keywords: Hadron-Hadron scattering (experiments)
Description: Published: May 27, 2016
Rights: © The Author(s). Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
RMID: 0030049773
DOI: 10.1007/JHEP05(2016)160
Appears in Collections:Physics publications

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