Search for electroweak production of a vector-like quark decaying to a top quark and a Higgs boson using boosted topologies in fully hadronic final states
A search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a standard model top or bottom quark, using 2.3 fb−1 of proton-proton collision data at √ s = 13 TeV collected by the CMS experiment at the CERN LHC. The search targets T quark...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Verlag
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/63070/ http://irep.iium.edu.my/63070/ http://irep.iium.edu.my/63070/ http://irep.iium.edu.my/63070/1/63070_Search%20for%20electroweak%20production_article.pdf http://irep.iium.edu.my/63070/2/63070_Search%20for%20electroweak%20production_scopus.pdf |
| Summary: | A search is performed for electroweak production of a vector-like top quark
partner T of charge 2/3 in association with a standard model top or bottom quark, using
2.3 fb−1 of proton-proton collision data at √
s = 13 TeV collected by the CMS experiment
at the CERN LHC. The search targets T quarks decaying to a top quark and a Higgs
boson in fully hadronic final states. For a T quark with mass above 1 TeV the daughter
top quark and Higgs boson are highly Lorentz-boosted and can each appear as a single
hadronic jet. Jet substructure and b tagging techniques are used to identify the top quark
and Higgs boson jets, and to suppress the standard model backgrounds. An excess of events
is searched for in the T quark candidate mass distribution in the data, which is found to
be consistent with the expected backgrounds. Upper limits at 95% confidence level are set
on the product of the single T quark production cross sections and the branching fraction
B(T → tH), and these vary between 0.31 and 0.93 pb for T quark masses in the range
1000–1800 GeV. This is the first search for single electroweak production of a vector-like
T quark in fully hadronic final states. |
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