Please use this identifier to cite or link to this item:
https://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: | The 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. |
DOI: | 10.1007/JHEP05(2016)160 |
Published version: | http://dx.doi.org/10.1007/jhep05(2016)160 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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hdl_115205.pdf | Published version | 2.22 MB | Adobe PDF | View/Open |
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