Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV
Results are presented for an extraction of the top quark Yukawa coupling from top quark-antiquark (t¯t) kinematic distributions in the lepton plus jets final state in proton-proton collisions, based on data collected by the CMS experiment at the LHC at ffiffi s p ¼ 13 TeV, corresponding to an int...
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my.iium.irep.798912020-07-01T03:10:20Z http://irep.iium.edu.my/79891/ Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Bergauer, Thomas Md. Ali, Mohd. Adli Q Science (General) QC Physics Results are presented for an extraction of the top quark Yukawa coupling from top quark-antiquark (t¯t) kinematic distributions in the lepton plus jets final state in proton-proton collisions, based on data collected by the CMS experiment at the LHC at ffiffi s p ¼ 13 TeV, corresponding to an integrated luminosity of 35.8 fb−1. Corrections from weak boson exchange, including Higgs bosons, between the top quarks can produce large distortions of differential distributions near the energy threshold of t¯t production. Therefore, precise measurements of these distributions are sensitive to the Yukawa coupling. Top quark events are reconstructed with at least three jets in the final state, and a novel technique is introduced to reconstruct the t¯t system for events with one missing jet. This technique enhances the experimental sensitivity in the low invariant mass region, Mt¯t. The data yields in Mt¯t, the rapidity difference jyt − y¯tj, and the number of reconstructed jets are compared with distributions representing different Yukawa couplings. These comparisons are used to measure the ratio of the top quark Yukawa coupling to its standard model predicted value to be 1.07þ0.34 −0.43 with an upper limit of 1.67 at the 95% confidence level. American Physical Society 2019-10-17 Article NonPeerReviewed application/pdf en http://irep.iium.edu.my/79891/1/79891_Measurement%20of%20the%20top%20quark%20Yukawa%20coupling%20from%20t%C2%AFt_article.pdf application/pdf en http://irep.iium.edu.my/79891/2/79891_Measurement%20of%20the%20top%20quark%20Yukawa%20coupling%20from%20t%C2%AFt_scopus.pdf application/pdf en http://irep.iium.edu.my/79891/3/79891_Measurement%20of%20the%20top%20quark%20Yukawa%20coupling%20from%20t%C2%AFt_wos.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Bergauer, Thomas and Md. Ali, Mohd. Adli (2019) Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV. Physical Review D, 100 (7). pp. 1-29. ISSN 2470-0010 E-ISSN 2470-0029 https://journals.aps.org/prd/pdf/10.1103/PhysRevD.100.072007 10.1103/PhysRevD.100.072007 |
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Q Science (General) QC Physics Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Bergauer, Thomas Md. Ali, Mohd. Adli Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV |
description |
Results are presented for an extraction of the top quark Yukawa coupling from top quark-antiquark (t¯t)
kinematic distributions in the lepton plus jets final state in proton-proton collisions, based on data collected
by the CMS experiment at the LHC at ffiffi
s p ¼ 13 TeV, corresponding to an integrated luminosity of
35.8 fb−1. Corrections from weak boson exchange, including Higgs bosons, between the top quarks can
produce large distortions of differential distributions near the energy threshold of t¯t production. Therefore,
precise measurements of these distributions are sensitive to the Yukawa coupling. Top quark events are
reconstructed with at least three jets in the final state, and a novel technique is introduced to reconstruct the
t¯t system for events with one missing jet. This technique enhances the experimental sensitivity in the low
invariant mass region, Mt¯t. The data yields in Mt¯t, the rapidity difference jyt − y¯tj, and the number of
reconstructed jets are compared with distributions representing different Yukawa couplings. These
comparisons are used to measure the ratio of the top quark Yukawa coupling to its standard model
predicted value to be 1.07þ0.34 −0.43 with an upper limit of 1.67 at the 95% confidence level. |
format |
Article |
author |
Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Bergauer, Thomas Md. Ali, Mohd. Adli |
author_facet |
Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Bergauer, Thomas Md. Ali, Mohd. Adli |
author_sort |
Sirunyan, A. M. |
title |
Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV |
title_short |
Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV |
title_full |
Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV |
title_fullStr |
Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV |
title_full_unstemmed |
Measurement of the top quark Yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 TeV |
title_sort |
measurement of the top quark yukawa coupling from t(t)over-bar kinematic distributions in the lepton plus jets final state in proton-proton collisions at root s=13 tev |
publisher |
American Physical Society |
publishDate |
2019 |
url |
http://irep.iium.edu.my/79891/1/79891_Measurement%20of%20the%20top%20quark%20Yukawa%20coupling%20from%20t%C2%AFt_article.pdf http://irep.iium.edu.my/79891/2/79891_Measurement%20of%20the%20top%20quark%20Yukawa%20coupling%20from%20t%C2%AFt_scopus.pdf http://irep.iium.edu.my/79891/3/79891_Measurement%20of%20the%20top%20quark%20Yukawa%20coupling%20from%20t%C2%AFt_wos.pdf http://irep.iium.edu.my/79891/ https://journals.aps.org/prd/pdf/10.1103/PhysRevD.100.072007 |
_version_ |
1672610183311785984 |
score |
13.160551 |