Search for single production of vector-like quarks decaying to a top quark and a W boson in proton–proton collisions at √s = 13 TeV
A search is presented for the single production of vector-like quarks in proton–proton collisions at √s = 13 TeV. The data, corresponding to an integrated luminosity of 35.9 fb−1, were recorded with the CMS experiment at the LHC. The analysis focuses on the vector-like quark decay into a top qu...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer Nature
2019
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/71634/1/71634_Search%20for%20single%20production%20of%20vector-like%20quarks_article.pdf http://irep.iium.edu.my/71634/2/71634_Search%20for%20single%20production%20of%20vector-like%20quarks_wos.pdf http://irep.iium.edu.my/71634/3/71634_Search%20for%20single%20production%20of%20vector-like%20quarks_scopus.pdf http://irep.iium.edu.my/71634/ https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-019-6556-3.pdf |
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| Summary: | A search is presented for the single production
of vector-like quarks in proton–proton collisions at √s =
13 TeV. The data, corresponding to an integrated luminosity
of 35.9 fb−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 0.03 pb for vector-like quark
masses of 700 to 2000 GeV. Mass exclusion limits up to
1660 GeV 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 vectorlike quarks in this channel. |
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