# Search for the Standard Model Higgs boson decaying into $$b\overline{b}$$ produced in association with top quarks decaying hadronically in pp collisions at $$\sqrt{s}=8$$ TeV with the ATLAS detector

 Title: Search for the Standard Model Higgs boson decaying into $$b\overline{b}$$ produced in association with top quarks decaying hadronically in pp collisions at $$\sqrt{s}=8$$ TeV with the ATLAS detector Author: Franklin, Melissa; Huth, John; Morii, Masahiro Note: Order does not necessarily reflect citation order of authors. Citation: ATLAS Collaboration. 2016. Search for the Standard Model Higgs boson decaying into $$b\overline{b}$$ produced in association with top quarks decaying hadronically in pp collisions at $$\sqrt{s}=8$$ TeV with the ATLAS detector. J. High Energ. Phys. 5. doi:10.1007/jhep05(2016)160. Full Text & Related Files: 1604.03812.pdf (1.175Mb; PDF) Abstract: A search for Higgs boson production in association with a pair of top quarks (ttH¯ ) 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 ttH¯ 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. Published Version: doi:10.1007/JHEP05(2016)160 Other Sources: https://arxiv.org/pdf/1604.03812.pdf Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:29362019 Downloads of this work: