Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb̅ pair in pp collisions at √s = 13 TeV with the ATLAS detector. Physical review. D - particles, fields, gravitation, and cosmology, 97(7) American Physical Society 10.1103/PhysRevD.97.072016
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A search for the standard model Higgs boson produced in association with a top-quark pair, tt̅H, is presented. The analysis uses 36.1fb⁻¹ of pp collision data at √s = 13 TeV collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search targets the H → bb̅ 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 tt̅ + jets production. For a Higgs boson mass of 125 GeV, the ratio of the measured tt̅H signal cross-section to the standard model expectation is found to be μ¼0.84 +0.64 −0.61. A value of μ greater than 2.0 is excluded at 95% confidence level (C.L.) while the expected upper limit is μ < 1.2 in the absence of a tt̅H signal.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
26 Jun 2019 11:03 |
Last Modified: |
05 Dec 2022 15:27 |
Publisher DOI: |
10.1103/PhysRevD.97.072016 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt |
BORIS DOI: |
10.7892/boris.129079 |
URI: |
https://boris.unibe.ch/id/eprint/129079 |
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