Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV

A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t¯tH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy √ s = 13 TeV. The data correspond to an integrated lum...

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Main Authors:	Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Md. Ali, Mohd. Adli
Format:	Article
Language:	English English English
Published:	Springer Verlag 2019
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/1/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_article.pdf http://irep.iium.edu.my/71730/2/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_wos.pdf http://irep.iium.edu.my/71730/3/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_scopus.pdf

id	iium-71730
recordtype	eprints
spelling	iium-717302019-07-12T02:52:19Z http://irep.iium.edu.my/71730/ Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Q Science (General) QC Physics A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t¯tH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy √ s = 13 TeV. The data correspond to an integrated luminosity of 35.9 fb−1 recorded with the CMS detector at the CERN LHC. Candidate t¯tH events are selected that contain either one or two electrons or muons from the t¯t decays and are categorised according to the number of jets. Multivariate techniques are employed to further classify the events and eventually discriminate between signal and background. The results are characterised by an observed t¯tH signal strength relative to the standard model cross section, µ = σ/σSM, under the assumption of a Higgs boson mass of 125 GeV. A combined fit of multivariate discriminant distributions in all categories results in an observed (expected) upper limit on µ of 1.5 (0.9) at 95% confidence level, and a best fit value of 0.72±0.24(stat)±0.38(syst), corresponding to an observed (expected) signal significance of 1.6 (2.2) standard deviations above the background-only hypothesis. Springer Verlag 2019-03-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/71730/1/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_article.pdf application/pdf en http://irep.iium.edu.my/71730/2/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_wos.pdf application/pdf en http://irep.iium.edu.my/71730/3/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_scopus.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2019) Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV. Journal of High Energy Physics, 2019 (3). pp. 1-61. ISSN 1126-6708 E-ISSN 1029-8479 https://link.springer.com/content/pdf/10.1007%2FJHEP03%282019%29026.pdf 10.1007/JHEP03(2019)026
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	Q Science (General) QC Physics
spellingShingle	Q Science (General) QC Physics Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV
description	A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t¯tH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy √ s = 13 TeV. The data correspond to an integrated luminosity of 35.9 fb−1 recorded with the CMS detector at the CERN LHC. Candidate t¯tH events are selected that contain either one or two electrons or muons from the t¯t decays and are categorised according to the number of jets. Multivariate techniques are employed to further classify the events and eventually discriminate between signal and background. The results are characterised by an observed t¯tH signal strength relative to the standard model cross section, µ = σ/σSM, under the assumption of a Higgs boson mass of 125 GeV. A combined fit of multivariate discriminant distributions in all categories results in an observed (expected) upper limit on µ of 1.5 (0.9) at 95% confidence level, and a best fit value of 0.72±0.24(stat)±0.38(syst), corresponding to an observed (expected) signal significance of 1.6 (2.2) standard deviations above the background-only hypothesis.
format	Article
author	Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli
author_facet	Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli
author_sort	Sirunyan, A. M.
title	Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV
title_short	Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV
title_full	Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV
title_fullStr	Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV
title_full_unstemmed	Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV
title_sort	search for t¯th production in the h→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 tev
publisher	Springer Verlag
publishDate	2019
url	http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/ http://irep.iium.edu.my/71730/1/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_article.pdf http://irep.iium.edu.my/71730/2/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_wos.pdf http://irep.iium.edu.my/71730/3/71730_Search%20for%20t%28t%29over-barH%20production%20in%20the%20H_scopus.pdf
first_indexed	2023-09-18T21:41:43Z
last_indexed	2023-09-18T21:41:43Z
_version_	1777413184360022016

Search for t¯tH production in the H→bb¯decay channel with leptonic t¯t decays in proton-proton collisions at √s = 13 TeV

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