Search for the standard model Higgs boson produced in association with top quarks and decaying into a b(b)overbar pair in \(pp\) collisions at root \(s\)=13 TeV with the ATLAS detector

Please always quote using this URN: urn:nbn:de:bvb:20-opus-226545

  • A search for the standard model Higgs boson produced in association with a top-quark pair, t(t)overbarH, is presented. The analysis uses 36.1 fb(-1) of pp collision data at root s = 13 TeV collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search targets the H -> b(b)overbar decay mode. The selected events contain either one or two electrons or muons from the top-quark decays, and are then categorized according to the number of jets and how likely these are to contain b-hadrons. Multivariate techniques are usedA search for the standard model Higgs boson produced in association with a top-quark pair, t(t)overbarH, is presented. The analysis uses 36.1 fb(-1) of pp collision data at root s = 13 TeV collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search targets the H -> b(b)overbar decay mode. The selected events contain either one or two electrons or muons from the top-quark decays, and are then categorized according to the number of jets and how likely these are to contain b-hadrons. Multivariate techniques are used to discriminate between signal and background events, the latter being dominated by ft + jets production. For a Higgs boson mass of 125 GeV, the ratio of the measured t(t)overbarH signal cross-section to the standard model expectation is found to be mu = 0.84(-0.61)(+0.64). A value of mu greater than 2.0 is excluded at 95% confidence level (C.L.) while the expected upper limit is mu < 1.2 in the absence of a t(t)overbarH signal.show moreshow less

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Metadaten
URN:urn:nbn:de:bvb:20-opus-226545
Document Type:Journal article
Faculties:Fakultät für Physik und Astronomie / Physikalisches Institut
Language:English
Parent Title (English):Physical Review D
Year of Completion:2018
Volume:97
Issue:7
Article Number:072016
Pagenumber:1-44
Source:Phys. Rev. D 97, 072016, 2018. doi:10.1103/PhysRevD.97.072016
DOI:https://doi.org/10.1103/PhysRevD.97.072016
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Tag:++; Higgs bosons; MASS; Symmetries; Top quark; program; spontaneous symmetry breaking
Release Date:2023/10/24
Creating Corporation:The ATLAS Collaboration
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International