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Type: Journal article
Title: Search for the standard model Higgs boson produced in association with top quarks and decaying into a b¯b pair in pp collisions at √s=13  TeV with the ATLAS detector
Other Titles: Search for the standard model Higgs boson produced in association with top quarks and decaying into a b -bar b pair in pp collisions at root s=13TeV with the ATLAS detector
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abdinov, O.
Abeloos, B.
Abidi, S.
Abouzeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.
Adachi, S.
Adamczyk, L.
Adelman, J.
Adersberger, M.
Adye, T.
Affolder, A.
Afik, Y.
Agheorghiesei, C.
et al.
Citation: Physical Review D, 2018; 97(7):072016-1-072016-44
Publisher: American Physical Society
Issue Date: 2018
ISSN: 2470-0010
Statement of
Damir Duvnjak … Paul D. Jackson … Jason L. Oliver … Andreas Petridis … Anum Qureshi … Abhishek Sharma … Martin White … et al. (ATLAS Collaboration)
Abstract: A search for the standard model Higgs boson produced in association with a top-quark pair, t¯tH, 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→b¯b 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 t¯t+jets production. For a Higgs boson mass of 125 GeV, the ratio of the measured t¯tH signal cross-section to the standard model expectation is found to be μ=0.84+0.64−0.61. 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 t¯tH signal.
Rights: © 2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
RMID: 0030087646
DOI: 10.1103/PhysRevD.97.072016
Appears in Collections:Physics publications

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