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- W2338527021 abstract "A search for Higgs boson production in association with a pair of top quarks ( $$ toverline{t}H $$ ) is performed, where the Higgs boson decays to $$ boverline{b} $$ , and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb−1 of pp collisions at $$ sqrt{s}=8 $$ 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 $$ toverline{t}H $$ searches carried out by ATLAS at $$ sqrt{s}=8 $$ 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." @default.
- W2338527021 created "2016-06-24" @default.
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