%0 Journal Article %T Search for the Standard Model Higgs boson decaying into b(b)over-bar produced in association with top quarks decaying hadronically in pp collisions at root s=8 TeV with the ATLAS detector %A ATLAS Collaboration (Aad, G. et al %A Alvarez Piqueras, D. %A Barranco Navarro, L. %A Cabrera Urban, S. %A Castillo Gimenez, V. %A Cerda Alberich, L. %A Costa, M. J. %A Fernandez Martinez, P. %A Ferrer, A. %A Fiorini, L. %A Fuster, J. %A Garcia, C. %A Garcia Navarro, J. E. %A Gonzalez de la Hoz, S. %A Hernandez Jimenez, Y. %A Higon-Rodriguez, E. %A Jimenez Pena, J. %A King, M. %A Lacasta, C. %A Lacuesta, V. R. %A Mamuzic, J. %A Marti-Garcia, S. %A Mitsou, V. A. %A Pedraza Lopez, S. %A Rodriguez Rodriguez, D. %A Romero Adam, E. %A Ros, E. %A Salt, J. %A Sanchez Martinez, V. %A Soldevila, U. %A Sanchez, J. %A Valero, A. %A Valls Ferrer, J. A. %A Vos, M. %J Journal of High Energy Physics %D 2016 %V 05 %N 5 %I Springer %@ 1029-8479 %G English %F ATLASCollaborationAad_etal2016 %O WOS:000377602900001 %O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2729), last updated on Thu, 07 Jul 2016 12:16:52 +0000 %X A search for Higgs boson production in association with a pair of top quarks (t (t) over barH) is performed, where the Higgs boson decays to b (b) over bar, and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb(-1) of pp collisions at root 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 t (t) over barH searches carried out by ATLAS at root 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. %K Hadron-Hadron scattering (experiments) %R 10.1007/JHEP05(2016)160 %U http://arxiv.org/abs/1604.03812 %U https://doi.org/10.1007/JHEP05(2016)160 %P 160-51pp