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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
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ATLAS Collaboration (Including: Beckingham, M., Ennis, Joseph Stanford, Farrington, Sinead, Harrison, P. F., Jeske, C., Jones, G. (Graham), Martin, T. A., Murray, W., Pianori, E. and Spangenberg, Martin). (2016) 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. Journal of High Energy Physics, 2016 (5). 160. doi:10.1007/jhep05(2016)160 ISSN 1029-8479.
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Official URL: https://doi.org/10.1007/jhep05(2016)160
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 mH = 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.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Journal of High Energy Physics | ||||||
Publisher: | Springer Berlin Heidelberg | ||||||
ISSN: | 1029-8479 | ||||||
Official Date: | 27 May 2016 | ||||||
Dates: |
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Volume: | 2016 | ||||||
Number: | 5 | ||||||
Article Number: | 160 | ||||||
DOI: | 10.1007/jhep05(2016)160 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Reuse Statement (publisher, data, author rights): | ** From Springer Nature via Jisc Publications Router. ** History: ** received: 14-04-2016 ** collection: 01-05-2016 ** accepted: 13-05-2016 ** epub: 27-05-2016 | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 14 September 2018 | ||||||
Date of first compliant Open Access: | 14 September 2018 |
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