Search for the Standard Model Higgs boson decaying into bb¯¯bb¯ produced in association with top quarks decaying hadronically in pp collisions at s√=8s=8 TeV with the ATLAS detector
A search for Higgs boson production in association with a pair of top quarks ( tt¯Htt¯H ) is performed, where the Higgs boson decays to bb¯¯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√=8s=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...