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Search for the associated production of the Higgs boson with a top-quark pair

Author(s)
CMS Collaboration; Apyan, Aram; Barbieri, Richard Alexander; Busza, Wit; Cali, Ivan Amos; Chan, M.; Di Matteo, Leonardo; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Yue Shi; Lee, Yen-Jie; Paus, Christoph M. E.; Ralph, Duncan Kelley; Stephans, George S. F.; Stoeckli, Fabian; Velicanu, Dragos Alexandru; Veverka, Jan; Wyslouch, Boleslaw; Zanetti, Marco; Levin, Andrew Michael; Luckey Jr, P David; Ma, Teng; Roland, Christof E; Roland, Gunther M; Sumorok, Konstanty C; Yang, Mingming; Wyslouch, Victoria; Bauer, Gerry P; ... Show more Show less
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Abstract
A search for the standard model Higgs boson produced in association with a top-quark pair (tt¯H) is presented, using data samples corresponding to integrated luminosities of up to 5.1 fb−1 and 19.7 fb−1 collected in pp collisions at center-of-mass energies of 7 TeV and 8 TeV respectively. The search is based on the following signatures of the Higgs boson decay: H → hadrons, H → photons, and H → leptons. The results are characterized by an observed tt¯H signal strength relative to the standard model cross section, μ=σ/σ SM,under the assumption that the Higgs boson decays as expected in the standard model. The best fit value is μ = 2.8 ± 1.0 for a Higgs boson mass of 125.6 GeV.
Date issued
2014-09
URI
http://hdl.handle.net/1721.1/91171
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag Berlin Heidelberg
Citation
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, et al. “Search for the Associated Production of the Higgs Boson with a Top-Quark Pair.” J. High Energ. Phys. 2014, no. 9 (September 2014).
Version: Final published version
ISSN
1029-8479

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