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Abstract: Results of a search for the standard model Higgs boson produced in association with a top quark pair (t t ¯ H) in final states with electrons, muons, and hadronically decaying ? leptons are presented. The analyzed data set corresponds to an integrated luminosity of 35.9 fb?1 recorded in proton-proton collisions at s=13 TeV by the CMS experiment in 2016. The sensitivity of the search is improved by using matrix element and machine learning methods to separate the signal from backgrounds. The measured signal rate amounts to 1.23? 0.43 + 0.45 times the production rate expected in the standard model, with an observed (expected) significance of 3.2? (2.8?), which represents evidence for t t ¯ H production in those final states. An upper limit on the signal rate of 2.1 times the standard model production rate is set at 95% confidence level.
Fuente: Journal of High Energy Physics, Vol. 2018, Num. 08, Art. Num. 066
Publisher: Springer Verlag
Publication date: 13/08/2018
No. of pages: 55
Publication type: Article
DOI: 10.1007/JHEP08(2018)066
ISSN: 1126-6708,1029-8479
Publication Url: https://doi.org/10.1007/JHEP08(2018)066
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SIRUNYAN, A. M.
ALICIA CALDERON TAZON
JOSE IBAN CABRILLO BARTOLOME
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
JUAN GARCIA FERRERO
GERVASIO GOMEZ GRAMUGLIO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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