Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV

A search is presented for a heavy spin-1 resonance Z decaying to a top quark and a vector-like top quark partner T in the lepton + jets final state. The search is performed using a data set of pp collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1...

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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 2019
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/71727/ http://irep.iium.edu.my/71727/ http://irep.iium.edu.my/71727/ http://irep.iium.edu.my/71727/1/71727_Search%20for%20a%20heavy%20resonance%20decaying_article.pdf http://irep.iium.edu.my/71727/2/71727_Search%20for%20a%20heavy%20resonance%20decaying_wos.pdf http://irep.iium.edu.my/71727/3/71727_Search%20for%20a%20heavy%20resonance%20decaying_scopus.pdf

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spelling	iium-717272019-07-12T02:41:19Z http://irep.iium.edu.my/71727/ Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp 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 a heavy spin-1 resonance Z decaying to a top quark and a vector-like top quark partner T in the lepton + jets final state. The search is performed using a data set of pp collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1 as recorded by the CMS experiment at the CERN LHC in the year 2016. The analysis is optimised for final states arising from the T decay modes to a top quark and a Higgs or Z boson (T → Ht, Zt). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and Z and W bosons using jet substructure techniques. No significant deviation from the standard model background expectation is observed. Exclusion limits on the product of the cross section and branching fraction for Z → tT, T → Ht, Zt, Wb are presented for various combinations of the Z resonance mass and the vector-like T quark mass. These results represent the most stringent limits to date for the decay mode Z → tT → tHt. In a benchmark model with extra dimensions, invoking a heavy spin-1 resonance G∗, masses of the G∗ between 1.5 and 2.3 TeV and between 2.0 and 2.4 TeV are excluded for T masses of 1.2 and 1.5 TeV, respectively Springer Nature 2019-03-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/71727/1/71727_Search%20for%20a%20heavy%20resonance%20decaying_article.pdf application/pdf en http://irep.iium.edu.my/71727/2/71727_Search%20for%20a%20heavy%20resonance%20decaying_wos.pdf application/pdf en http://irep.iium.edu.my/71727/3/71727_Search%20for%20a%20heavy%20resonance%20decaying_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 a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV. European Physical Journal C, 79 (3). pp. 1-32. ISSN 1434-6044 E-ISSN 1434-6052 https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-019-6688-5.pdf 10.1140/epjc/s10052-019-6688-5
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 a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV
description	A search is presented for a heavy spin-1 resonance Z decaying to a top quark and a vector-like top quark partner T in the lepton + jets final state. The search is performed using a data set of pp collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1 as recorded by the CMS experiment at the CERN LHC in the year 2016. The analysis is optimised for final states arising from the T decay modes to a top quark and a Higgs or Z boson (T → Ht, Zt). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and Z and W bosons using jet substructure techniques. No significant deviation from the standard model background expectation is observed. Exclusion limits on the product of the cross section and branching fraction for Z → tT, T → Ht, Zt, Wb are presented for various combinations of the Z resonance mass and the vector-like T quark mass. These results represent the most stringent limits to date for the decay mode Z → tT → tHt. In a benchmark model with extra dimensions, invoking a heavy spin-1 resonance G∗, masses of the G∗ between 1.5 and 2.3 TeV and between 2.0 and 2.4 TeV are excluded for T masses of 1.2 and 1.5 TeV, respectively
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 a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV
title_short	Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV
title_full	Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV
title_fullStr	Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV
title_full_unstemmed	Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV
title_sort	search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 tev
publisher	Springer Nature
publishDate	2019
url	http://irep.iium.edu.my/71727/ http://irep.iium.edu.my/71727/ http://irep.iium.edu.my/71727/ http://irep.iium.edu.my/71727/1/71727_Search%20for%20a%20heavy%20resonance%20decaying_article.pdf http://irep.iium.edu.my/71727/2/71727_Search%20for%20a%20heavy%20resonance%20decaying_wos.pdf http://irep.iium.edu.my/71727/3/71727_Search%20for%20a%20heavy%20resonance%20decaying_scopus.pdf
first_indexed	2023-09-18T21:41:43Z
last_indexed	2023-09-18T21:41:43Z
_version_	1777413184055934976

Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at √s = 13 TeV

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