@Article{ATLASCollaborationAad_etal2015, author="ATLAS Collaboration (Aad, G. et al and Alvarez Piqueras, D. and Cabrera Urban, S. and Castillo Gimenez, V. and Costa, M. J. and Fernandez Martinez, P. and Ferrer, A. and Fiorini, L. and Fuster, J. and Garcia, C. and Garcia Navarro, J. E. and Gonzalez de la Hoz, S. and Hernandez Jimenez, Y. and Higon-Rodriguez, E. and Irles Quiles, A. and Jimenez Pena, J. and Kaci, M. and King, M. and Lacasta, C. and Lacuesta, V. R. and Marti-Garcia, S. and Mitsou, V. A. and Moles-Valls, R. and Oliver Garcia, E. and Pedraza Lopez, S. and Perez Garcia-Esta{\~A}{\textpm}, M. T. and Romero Adam, E. and Ros, E. and Salt, J. and Sanchez Martinez, V. and Soldevila, U. and Sanchez, J. and Torro Pastor, E. and Valero, A. and Valladolid Gallego, E. and Valls Ferrer, J. A. and Vos, M.", title="Search for the Standard Model Higgs boson produced in association with top quarks and decaying into in collisions at with the ATLAS detector", journal="European Physical Journal C", year="2015", publisher="Springer", volume="75", number="7", pages="349--50pp", abstract="A search for the Standard Model Higgs boson produced in association with a top-quark pair, , is presented. The analysis uses 20.3 fb(-1) of pp collision data at , collected with the ATLAS detector at the Large Hadron Collider during 2012. The search is designed for the decay mode and uses events containing one or two electrons or muons. In order to improve the sensitivity of the search, events are categorised according to their jet and b-tagged jet multiplicities. A neural network is used to discriminate between signal and background events, the latter being dominated by +jets production. In the single-lepton channel, variables calculated using a matrix element method are included as inputs to the neural network to improve discrimination of the irreducible background. No significant excess of events above the background expectation is found and an observed (expected) limit of 3.4 (2.2) times the Standard Model cross section is obtained at 95 {\%} confidence level. The ratio of the measured signal cross section to the Standard Model expectation is found to be assuming a Higgs boson mass of 125 Gev.", optnote="WOS:000358606700001", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2334), last updated on Tue, 08 Sep 2015 18:00:46 +0000", issn="1434-6044", doi="10.1140/epjc/s10052-015-3543-1", opturl="http://arxiv.org/abs/1503.05066", opturl="https://doi.org/10.1140/epjc/s10052-015-3543-1", archivePrefix="arXiv", eprint="1503.05066", language="English" }