Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at √s = 13 TeV
A search for the pair production of heavy vectorlike partners T and B of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton–proton collisions at √s = 13 TeV. The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9 fb−1...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer New York LLC
2019
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/79787/ http://irep.iium.edu.my/79787/1/79787_Search%20for%20vector-like%20quarks.pdf http://irep.iium.edu.my/79787/2/79787_Search%20for%20vector-like%20quarks_SCOPUS.pdf http://irep.iium.edu.my/79787/15/79787_Search%20for%20vector-like%20quarks%20in%20events_wos.pdf |
| Summary: | A search for the pair production of heavy vectorlike partners T and B of the top and bottom quarks has been
performed by the CMS experiment at the CERN LHC using
proton–proton collisions at √s = 13 TeV. The data sample
was collected in 2016 and corresponds to an integrated luminosity of 35.9 fb−1. Final states studied for TT production
include those where one of the T quarks decays via T → tZ
and the other via T → bW, tZ, or tH, where H is a Higgs
boson. For the BB case, final states include those where one
of the B quarks decays via B → bZ and the other B → tW,
bZ, or bH. Events with two oppositely charged electrons
or muons, consistent with coming from the decay of a Z
boson, and jets are investigated. The number of observed
events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on
the masses of the T and B quarks for a range of branching
fractions. Assuming 100% branching fractions for T → tZ,
and B → bZ, T and B quark mass values below 1280 and
1130 GeV, respectively, are excluded. |
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