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Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV

A measurement of the top quark–antiquark pair production cross section σtt in proton–proton collisions at a centre-of-mass energy of 13 TeV is presented. The data correspond to an integrated luminosity of 35.9 fb−1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e±μ∓, μ+...

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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 New York LLC 2019
Subjects:
Q Science (General)
QC Physics
Online Access:http://irep.iium.edu.my/79896/1/79896_Measurement%20of%20the%20tt%20production%20cross%20section_article.pdf
http://irep.iium.edu.my/79896/2/79896_Measurement%20of%20the%20tt%20production%20cross%20section_scopus.pdf
http://irep.iium.edu.my/79896/3/79896_Measurement%20of%20the%20tt%20production%20cross%20section_wos.pdf
http://irep.iium.edu.my/79896/
https://link.springer.com/content/pdf/10.1140/epjc/s10052-019-6863-8.pdf
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spelling my.iium.irep.798962020-07-01T04:41:10Z http://irep.iium.edu.my/79896/ Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Q Science (General) QC Physics A measurement of the top quark–antiquark pair production cross section σtt in proton–proton collisions at a centre-of-mass energy of 13 TeV is presented. The data correspond to an integrated luminosity of 35.9 fb−1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e±μ∓, μ+μ−, e+e−) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mMC t = 172.5 GeV the fit yields a measured cross section σtt = 803 ± 2 (stat) ± 25 (syst) ± 20 (lumi) pb, in agreement with the expectation from the standard model calculation at next-to-next-toleading order. A simultaneous fit of the cross section and the top quark mass parameter in the powheg simulation is performed. The measured value of mMC t = 172.33 ± 0.14 (stat) +0.66 −0.72 (syst) GeV is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions. Springer New York LLC 2019-05-01 Article NonPeerReviewed application/pdf en http://irep.iium.edu.my/79896/1/79896_Measurement%20of%20the%20tt%20production%20cross%20section_article.pdf application/pdf en http://irep.iium.edu.my/79896/2/79896_Measurement%20of%20the%20tt%20production%20cross%20section_scopus.pdf application/pdf en http://irep.iium.edu.my/79896/3/79896_Measurement%20of%20the%20tt%20production%20cross%20section_wos.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2019) Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV. European Physical Journal C, 79 (5). pp. 1-36. ISSN 1434-6044 E-ISSN 1434-6052 https://link.springer.com/content/pdf/10.1140/epjc/s10052-019-6863-8.pdf 10.1140/epjc/s10052-019-6863-8
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
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
Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV
description A measurement of the top quark–antiquark pair production cross section σtt in proton–proton collisions at a centre-of-mass energy of 13 TeV is presented. The data correspond to an integrated luminosity of 35.9 fb−1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e±μ∓, μ+μ−, e+e−) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mMC t = 172.5 GeV the fit yields a measured cross section σtt = 803 ± 2 (stat) ± 25 (syst) ± 20 (lumi) pb, in agreement with the expectation from the standard model calculation at next-to-next-toleading order. A simultaneous fit of the cross section and the top quark mass parameter in the powheg simulation is performed. The measured value of mMC t = 172.33 ± 0.14 (stat) +0.66 −0.72 (syst) GeV is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions.
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 Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV
title_short Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV
title_full Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV
title_fullStr Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV
title_full_unstemmed Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV
title_sort measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13tev
publisher Springer New York LLC
publishDate 2019
url http://irep.iium.edu.my/79896/1/79896_Measurement%20of%20the%20tt%20production%20cross%20section_article.pdf
http://irep.iium.edu.my/79896/2/79896_Measurement%20of%20the%20tt%20production%20cross%20section_scopus.pdf
http://irep.iium.edu.my/79896/3/79896_Measurement%20of%20the%20tt%20production%20cross%20section_wos.pdf
http://irep.iium.edu.my/79896/
https://link.springer.com/content/pdf/10.1140/epjc/s10052-019-6863-8.pdf
_version_ 1672610183740653568
score 13.211869

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