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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Nature
2018
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| Subjects: | |
| Online Access: | 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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| 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. |
| building | IIUM Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-14T17:22:27Z |
| format | Article |
| id | iium-70394 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T17:22:27Z |
| publishDate | 2018 |
| publisher | Springer Nature |
| recordtype | eprints |
| repository_type | Digital Repository |
| 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 |
| 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 |
| 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_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_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_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 |
| topic | Q Science (General) QC Physics |
| 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 |