Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV

A search for standard model production of four top quarks (t t ¯ t t ¯) is reported using events containing at least three leptons (e , μ) or a same-sign lepton pair. The events are produced in proton–proton collisions at a center-of-mass energy of 13TeV at the LHC, and the data sample, recorded in...

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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 Nature 2018
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/63120/ http://irep.iium.edu.my/63120/ http://irep.iium.edu.my/63120/ http://irep.iium.edu.my/63120/13/63120_Search%20for%20standard%20model%20production_article.pdf http://irep.iium.edu.my/63120/2/63120_Search%20for%20standard%20model%20production%20of%20four%20top%20quarks%20with%20same-sign_Scopus.pdf http://irep.iium.edu.my/63120/19/63120_Search%20for%20standard%20model%20production%20of%20four_WOS.pdf

id	iium-63120
recordtype	eprints
spelling	iium-631202019-07-15T01:28:18Z http://irep.iium.edu.my/63120/ Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Q Science (General) QC Physics A search for standard model production of four top quarks (t t ¯ t t ¯) is reported using events containing at least three leptons (e , μ) or a same-sign lepton pair. The events are produced in proton–proton collisions at a center-of-mass energy of 13TeV at the LHC, and the data sample, recorded in 2016, corresponds to an integrated luminosity of 35.9fb-1. Jet multiplicity and flavor are used to enhance signal sensitivity, and dedicated control regions are used to constrain the dominant backgrounds. The observed and expected signal significances are, respectively, 1.6 and 1.0 standard deviations, and the t t ¯ t t ¯ cross section is measured to be 16.9-11.4+13.8fb, in agreement with next-to-leading-order standard model predictions. These results are also used to constrain the Yukawa coupling between the top quark and the Higgs boson to be less than 2.1 times its expected standard model value at 95% confidence level. © 2018, CERN for the benefit of the CMS collaboration. Springer Nature 2018-02-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/63120/13/63120_Search%20for%20standard%20model%20production_article.pdf application/pdf en http://irep.iium.edu.my/63120/2/63120_Search%20for%20standard%20model%20production%20of%20four%20top%20quarks%20with%20same-sign_Scopus.pdf application/pdf en http://irep.iium.edu.my/63120/19/63120_Search%20for%20standard%20model%20production%20of%20four_WOS.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV. European Physical Journal C, 78 (2). pp. 1-24. ISSN 1434-6044 E-ISSN 1434-6052 https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5607-5 10.1140/epjc/s10052-018-5607-5
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 standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV
description	A search for standard model production of four top quarks (t t ¯ t t ¯) is reported using events containing at least three leptons (e , μ) or a same-sign lepton pair. The events are produced in proton–proton collisions at a center-of-mass energy of 13TeV at the LHC, and the data sample, recorded in 2016, corresponds to an integrated luminosity of 35.9fb-1. Jet multiplicity and flavor are used to enhance signal sensitivity, and dedicated control regions are used to constrain the dominant backgrounds. The observed and expected signal significances are, respectively, 1.6 and 1.0 standard deviations, and the t t ¯ t t ¯ cross section is measured to be 16.9-11.4+13.8fb, in agreement with next-to-leading-order standard model predictions. These results are also used to constrain the Yukawa coupling between the top quark and the Higgs boson to be less than 2.1 times its expected standard model value at 95% confidence level. © 2018, CERN for the benefit of the CMS collaboration.
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 standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV
title_short	Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV
title_full	Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV
title_fullStr	Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV
title_full_unstemmed	Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV
title_sort	search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13tev
publisher	Springer Nature
publishDate	2018
url	http://irep.iium.edu.my/63120/ http://irep.iium.edu.my/63120/ http://irep.iium.edu.my/63120/ http://irep.iium.edu.my/63120/13/63120_Search%20for%20standard%20model%20production_article.pdf http://irep.iium.edu.my/63120/2/63120_Search%20for%20standard%20model%20production%20of%20four%20top%20quarks%20with%20same-sign_Scopus.pdf http://irep.iium.edu.my/63120/19/63120_Search%20for%20standard%20model%20production%20of%20four_WOS.pdf
first_indexed	2023-09-18T21:29:33Z
last_indexed	2023-09-18T21:29:33Z
_version_	1777412418895347712

Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at √s=13TeV

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