Evidence for associated production of a Higgs boson with a top quark pair in final states with electrons, muons, and hadronically decaying τ leptons at s√=13s=13 TeV

Evidence for associated production of a Higgs boson with a top quark pair in final states with electrons, muons, and hadronically decaying τ leptons at s√=13s=13 TeV

Bibliographische Detailangaben
Parent link:	Journal of High Energy Physics Vol. 2018, iss. 8.— 2018.— [66, 55 p.]
Körperschaft:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Weitere Verfasser:	Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Asilar E. Ece, Bergauer T. Thomas, Babaev A. A. Anton Anatoljevich
Zusammenfassung:	Title screen Results of a search for the standard model Higgs boson produced in association with a top quark pair (tt¯Htt¯H) in final states with electrons, muons, and hadronically decaying τ leptons are presented. The analyzed data set corresponds to an integrated luminosity of 35.9 fb−1 recorded in proton-proton collisions at s√=13s=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 3.2σ (2.8σ), which represents evidence for tt¯Htt¯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. Режим доступа: по договору с организацией-держателем ресурса
Sprache:	Englisch
Veröffentlicht:	2018
Schlagworte:	электронный ресурс труды учёных ТПУ hadron-hadron scattering (experiments) Higgs physics адрон-адронные столкновения top physics
Online-Zugang:	https://doi.org/10.1007/JHEP08(2018)066
Format:	Elektronisch Buchkapitel
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=661247

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