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Title
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Search for single production of vector-like quarks decaying to a top quark and a W boson in proton-proton collisions at 13 TeV
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| A search is presented for the single production of vector-like quarks in proton-proton collisions at TeV. The data, corresponding to an integrated luminosity of 35.9fb-1, were recorded with the CMS experiment at the LHC. The analysis focuses on the vector-like quark decay into a top quark and a W boson, with one muon or electron in the final state. The mass of the vector-like quark candidate is reconstructed from hadronic jets, the lepton, and the missing transverse momentum. Methods for the identification of b quarks and of highly Lorentz boosted hadronically decaying top quarks and W bosons are exploited in this search. No significant deviation from the standard model background expectation is observed. Exclusion limits at 95% confidence level are set on the product of the production cross section and branching fraction as a function of the vector-like quark mass, which range from 0.3 to 0.03pb for vector-like quark masses of 700 to 2000GeV. Mass exclusion limits up to 1660GeV are obtained, depending on the vector-like quark type, coupling, and decay width. These represent the most stringent exclusion limits for the single production of vector-like quarks in this channel. |
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Language
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English
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Source (journal)
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European physical journal : C : particles and fields. - Berlin
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Publication
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Berlin
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2019
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ISSN
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1434-6044
1434-6052
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DOI
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10.1140/EPJC/S10052-019-6556-3
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Volume/pages
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79
:2
(2019)
, 29 p.
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Article Reference
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90
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ISI
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000457328300001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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