Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV
The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collect...
| Main Authors: | , , , , |
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| Format: | Article |
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American Physical Society
2019
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| Online Access: | http://irep.iium.edu.my/72646/ http://irep.iium.edu.my/72646/1/72646%20Observation%20of%20Single%20Top%20Quark.pdf http://irep.iium.edu.my/72646/2/72646%20Observation%20of%20Single%20Top%20Quark%20SCOPUS.pdf http://irep.iium.edu.my/72646/13/72646_Observation%20of%20Single%20Top%20Quark%20Production_wos.pdf |
| _version_ | 1848787652545871872 |
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| author | Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Md. Ali, Mohd. Adli |
| author_facet | Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Md. Ali, Mohd. Adli |
| author_sort | Sirunyan, A. M. |
| building | IIUM Repository |
| collection | Online Access |
| description | The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb-1. The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is σ(pp→tZq→t?+?-q)=111±13(stat)-9+11(syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation. |
| first_indexed | 2025-11-14T17:28:20Z |
| format | Article |
| id | iium-72646 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English English |
| last_indexed | 2025-11-14T17:28:20Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-726462022-07-15T03:21:47Z http://irep.iium.edu.my/72646/ Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Md. Ali, Mohd. Adli Q Science (General) QC Physics The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb-1. The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is σ(pp→tZq→t?+?-q)=111±13(stat)-9+11(syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation. American Physical Society 2019-04-05 Article PeerReviewed application/pdf en http://irep.iium.edu.my/72646/1/72646%20Observation%20of%20Single%20Top%20Quark.pdf application/pdf en http://irep.iium.edu.my/72646/2/72646%20Observation%20of%20Single%20Top%20Quark%20SCOPUS.pdf application/pdf en http://irep.iium.edu.my/72646/13/72646_Observation%20of%20Single%20Top%20Quark%20Production_wos.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Md. Ali, Mohd. Adli (2019) Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV. Physical Review Letters, 122 (13). pp. 1-19. ISSN 0031-9007 E-ISSN 1079-7114 https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.122.132003 10.1103/PhysRevLett.122.132003 |
| spellingShingle | Q Science (General) QC Physics Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Md. Ali, Mohd. Adli Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV |
| title | Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV |
| title_full | Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV |
| title_fullStr | Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV |
| title_full_unstemmed | Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV |
| title_short | Observation of single top quark production in association with a Z Boson in proton-proton collisions at s =13 TeV |
| title_sort | observation of single top quark production in association with a z boson in proton-proton collisions at s =13 tev |
| topic | Q Science (General) QC Physics |
| url | http://irep.iium.edu.my/72646/ http://irep.iium.edu.my/72646/ http://irep.iium.edu.my/72646/ http://irep.iium.edu.my/72646/1/72646%20Observation%20of%20Single%20Top%20Quark.pdf http://irep.iium.edu.my/72646/2/72646%20Observation%20of%20Single%20Top%20Quark%20SCOPUS.pdf http://irep.iium.edu.my/72646/13/72646_Observation%20of%20Single%20Top%20Quark%20Production_wos.pdf |