Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector. / Aad, G; Berry, Tracey; Blanco, Jacobo; Boisvert, Veronique; Brooks, Timothy; Connelly, Ian; Cowan, Glen; Duguid, Liam; Faucci Giannelli, Michele; George, Simon; Gibson, Stephen; Kempster, Jacob; Panduro Vazquez, Jose G; Pastore, Francesca; Savage, Graham; Spano, Francesco; Teixeira-Dias, Pedro; Thomas-Wilsker, Joshuha; The ATLAS Collaboration .

In: European Physical Journal C: Particles and Fields, Vol. 75, 349, 29.07.2015, p. 1-50.

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@article{65c7223494c84869882aab1eceaad77b,
title = "Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector",
abstract = "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.",
author = "G Aad and Tracey Berry and Jacobo Blanco and Veronique Boisvert and Timothy Brooks and Ian Connelly and Glen Cowan and Liam Duguid and {Faucci Giannelli}, Michele and Simon George and Stephen Gibson and Jacob Kempster and {Panduro Vazquez}, {Jose G} and Francesca Pastore and Graham Savage and Francesco Spano and Pedro Teixeira-Dias and Joshuha Thomas-Wilsker and {The ATLAS Collaboration}",
year = "2015",
month = jul,
day = "29",
doi = "10.1140/epjc/s10052-015-3543-1",
language = "English",
volume = "75",
pages = "1--50",
journal = "European Physical Journal C: Particles and Fields",
issn = "1434-6044",
publisher = "Springer New York",

}

RIS

TY - JOUR

T1 - Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector

AU - Aad, G

AU - Berry, Tracey

AU - Blanco, Jacobo

AU - Boisvert, Veronique

AU - Brooks, Timothy

AU - Connelly, Ian

AU - Cowan, Glen

AU - Duguid, Liam

AU - Faucci Giannelli, Michele

AU - George, Simon

AU - Gibson, Stephen

AU - Kempster, Jacob

AU - Panduro Vazquez, Jose G

AU - Pastore, Francesca

AU - Savage, Graham

AU - Spano, Francesco

AU - Teixeira-Dias, Pedro

AU - Thomas-Wilsker, Joshuha

AU - The ATLAS Collaboration

PY - 2015/7/29

Y1 - 2015/7/29

N2 - 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.

AB - 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.

UR - http://link.springer.com/article/10.1140/epjc/s10052-015-3543-1

U2 - 10.1140/epjc/s10052-015-3543-1

DO - 10.1140/epjc/s10052-015-3543-1

M3 - Article

VL - 75

SP - 1

EP - 50

JO - European Physical Journal C: Particles and Fields

JF - European Physical Journal C: Particles and Fields

SN - 1434-6044

M1 - 349

ER -