Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb[bar] in pp collisions at √s = 8TeV with the ATLAS detector
A search for the Standard Model Higgs boson produced in association with a top-quark pair, tt¯H, is presented. The analysis uses 20.3 fb−1 of pp collision data at s√=8TeV, collected with the ATLAS detector at the Large Hadron Collider during 2012. The search is designed for the H→bb¯ decay mode and...
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
29 July 2015
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| In: |
The European physical journal. C, Particles and fields
Year: 2015, Jahrgang: 75, Heft: 7, Pages: 1-50 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-015-3543-1 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-015-3543-1
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| Verfasserangaben: | ATLAS Collaboration* |
MARC
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| 245 | 1 | 0 | |a Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb[bar] in pp collisions at √s = 8TeV with the ATLAS detector |c ATLAS Collaboration* |
| 246 | 3 | 0 | |a sqrt |
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| 246 | 3 | 3 | |a Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb[bar] in proton-proton collisions at square root s = 8TeV with the ATLAS detector |
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| 500 | |a *ATLAS Collaboration: G. Aad, C.F. Anders, V. Andrei, A. Baas, O. Brandt, J.I. Djuvsland, M. Dunford, M. Geisler, P. Hanke, J. Jongmanns, E.-E. Kluge, A. Kugel, V. Lang, K. Meier, S. Schaetzel, V. Scharf, S. Schmitt, A. Schoening, H.-C. Schultz-Coulon, D. Sosa, R. Stamen, M. Wessels [und 2804 weitere Personen] | ||
| 500 | |a Im Titel steht der Buchstabe s unter dem Wurzelsymbol | ||
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| 500 | |a Gesehen am 09.07.2021 | ||
| 520 | |a A search for the Standard Model Higgs boson produced in association with a top-quark pair, tt¯H, is presented. The analysis uses 20.3 fb−1 of pp collision data at s√=8TeV, collected with the ATLAS detector at the Large Hadron Collider during 2012. The search is designed for the H→bb¯ 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 tt¯+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 tt¯+bb¯ 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 tt¯H signal cross section to the Standard Model expectation is found to be μ=1.5±1.1 assuming a Higgs boson mass of 125GeV. | ||
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