Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV

Three of the most significant measured deviations from standard model predictions, the enhanced decay rate for B → DðÞτν, hints of lepton universality violation in B → KðÞll decays, and the anomalous magnetic moment of the muon, can be explained by the existence of leptoquarks (LQs) with large cou...

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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
Published:	American Physical Society 2018
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/70721/ http://irep.iium.edu.my/70721/ http://irep.iium.edu.my/70721/ http://irep.iium.edu.my/70721/1/70721_Search%20for%20Leptoquarks%20Coupled%20to%20Third-Generation_article.pdf http://irep.iium.edu.my/70721/2/70721_Search%20for%20Leptoquarks%20Coupled%20to%20Third-Generation_scopus.pdf

id	iium-70721
recordtype	eprints
spelling	iium-707212019-07-12T08:57:52Z http://irep.iium.edu.my/70721/ Search for leptoquarks coupled to third-generation quarks 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 Three of the most significant measured deviations from standard model predictions, the enhanced decay rate for B → DðÞτν, hints of lepton universality violation in B → KðÞll decays, and the anomalous magnetic moment of the muon, can be explained by the existence of leptoquarks (LQs) with large couplings to third-generation quarks and masses at the TeV scale. The existence of these states can be probed at the LHC in high energy proton-proton collisions. A novel search is presented for pair production of LQs coupled to a top quark and a muon using data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1, recorded by the CMS experiment. No deviation from the standard model prediction has been observed and scalar LQs decaying exclusively into tμ are excluded up to masses of 1420 GeV. The results of this search are combined with those from previous searches for LQ decays into tτ and bν, which excluded scalar LQs below masses of 900 and 1080 GeV. Vector LQs are excluded up to masses of 1190 GeV for all possible combinations of branching fractions to tμ, tτ and bν. With this analysis, all relevant couplings of LQs with an electric charge of −1=3 to third-generation quarks are probed for the first time. American Physical Society 2018-12-12 Article PeerReviewed application/pdf en http://irep.iium.edu.my/70721/1/70721_Search%20for%20Leptoquarks%20Coupled%20to%20Third-Generation_article.pdf application/pdf en http://irep.iium.edu.my/70721/2/70721_Search%20for%20Leptoquarks%20Coupled%20to%20Third-Generation_scopus.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 leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV. Physical Review Letters, 121 (4). pp. 1-19. ISSN 0031-9007 E-ISSN 1079-7114 https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.121.241802 10.1103/PhysRevLett.121.241802
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	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 leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV
description	Three of the most significant measured deviations from standard model predictions, the enhanced decay rate for B → DðÞτν, hints of lepton universality violation in B → KðÞll decays, and the anomalous magnetic moment of the muon, can be explained by the existence of leptoquarks (LQs) with large couplings to third-generation quarks and masses at the TeV scale. The existence of these states can be probed at the LHC in high energy proton-proton collisions. A novel search is presented for pair production of LQs coupled to a top quark and a muon using data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1, recorded by the CMS experiment. No deviation from the standard model prediction has been observed and scalar LQs decaying exclusively into tμ are excluded up to masses of 1420 GeV. The results of this search are combined with those from previous searches for LQ decays into tτ and bν, which excluded scalar LQs below masses of 900 and 1080 GeV. Vector LQs are excluded up to masses of 1190 GeV for all possible combinations of branching fractions to tμ, tτ and bν. With this analysis, all relevant couplings of LQs with an electric charge of −1=3 to third-generation quarks are probed for the first time.
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 leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV
title_short	Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV
title_full	Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV
title_fullStr	Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV
title_full_unstemmed	Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV
title_sort	search for leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 tev
publisher	American Physical Society
publishDate	2018
url	http://irep.iium.edu.my/70721/ http://irep.iium.edu.my/70721/ http://irep.iium.edu.my/70721/ http://irep.iium.edu.my/70721/1/70721_Search%20for%20Leptoquarks%20Coupled%20to%20Third-Generation_article.pdf http://irep.iium.edu.my/70721/2/70721_Search%20for%20Leptoquarks%20Coupled%20to%20Third-Generation_scopus.pdf
first_indexed	2023-09-18T21:40:24Z
last_indexed	2023-09-18T21:40:24Z
_version_	1777413101259325440

Search for leptoquarks coupled to third-generation quarks in proton-proton collisions at s =13 TeV

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