Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV

A search for the pair production of the lightest supersymmetric partner of the top quark (et1) is presented. The search focuses on a compressed scenario where the mass difference between the top squark and the lightest supersymmetric particle, often considered to be the lightest neutralino (χe 0...

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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:	Springer Nature 2018
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/70394/ http://irep.iium.edu.my/70394/ http://irep.iium.edu.my/70394/ http://irep.iium.edu.my/70394/1/70394_Search%20for%20top%20squarks%20decaying%20via%20four-body_article.pdf http://irep.iium.edu.my/70394/2/70394_Search%20for%20top%20squarks%20decaying%20via%20four-body_scopus.pdf

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spelling	iium-703942019-07-15T01:33:07Z http://irep.iium.edu.my/70394/ Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states 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 A search for the pair production of the lightest supersymmetric partner of the top quark (et1) is presented. The search focuses on a compressed scenario where the mass difference between the top squark and the lightest supersymmetric particle, often considered to be the lightest neutralino (χe 0 1 ), is smaller than the mass of the W boson. The proton-proton collision data were recorded by the CMS experiment at a centre-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 35.9 fb−1 . In this search, two decay modes of the top squark are considered: a four-body decay into a bottom quark, two additional fermions, and a χe 0 1 ; and a decay via an intermediate chargino. Events are selected using the presence of a high-momentum jet, significant missing transverse momentum, and a low transverse momentum electron or muon. Two analysis techniques are used, targeting different decay modes of the et1: a sequential selection and a multivariate technique. No evidence for the production of top squarks is found, and mass limits at 95% confidence level are set that reach up to 560 GeV, depending on the m(et1) − m(χe 0 1 ) mass difference and the decay mode. Springer Nature 2018-09-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/70394/1/70394_Search%20for%20top%20squarks%20decaying%20via%20four-body_article.pdf application/pdf en http://irep.iium.edu.my/70394/2/70394_Search%20for%20top%20squarks%20decaying%20via%20four-body_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 top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV. Journal of High Energy Physics, 2018 (9). pp. 1-46. ISSN 1029-8479 https://link.springer.com/content/pdf/10.1007%2FJHEP09%282018%29065.pdf 10.1007/JHEP09(2018)065
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 top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV
description	A search for the pair production of the lightest supersymmetric partner of the top quark (et1) is presented. The search focuses on a compressed scenario where the mass difference between the top squark and the lightest supersymmetric particle, often considered to be the lightest neutralino (χe 0 1 ), is smaller than the mass of the W boson. The proton-proton collision data were recorded by the CMS experiment at a centre-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 35.9 fb−1 . In this search, two decay modes of the top squark are considered: a four-body decay into a bottom quark, two additional fermions, and a χe 0 1 ; and a decay via an intermediate chargino. Events are selected using the presence of a high-momentum jet, significant missing transverse momentum, and a low transverse momentum electron or muon. Two analysis techniques are used, targeting different decay modes of the et1: a sequential selection and a multivariate technique. No evidence for the production of top squarks is found, and mass limits at 95% confidence level are set that reach up to 560 GeV, depending on the m(et1) − m(χe 0 1 ) mass difference and the decay mode.
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 top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV
title_short	Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV
title_full	Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV
title_fullStr	Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV
title_full_unstemmed	Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV
title_sort	search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 tev
publisher	Springer Nature
publishDate	2018
url	http://irep.iium.edu.my/70394/ http://irep.iium.edu.my/70394/ http://irep.iium.edu.my/70394/ http://irep.iium.edu.my/70394/1/70394_Search%20for%20top%20squarks%20decaying%20via%20four-body_article.pdf http://irep.iium.edu.my/70394/2/70394_Search%20for%20top%20squarks%20decaying%20via%20four-body_scopus.pdf
first_indexed	2023-09-18T21:39:56Z
last_indexed	2023-09-18T21:39:56Z
_version_	1777413071940091904

Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at √s=13 TeV

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