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Search for single production of vector-like T quarks decaying into Ht or Zt in pp collisions at √s = 13 TeV with the ATLAS detector ATLAS Collaboration
Abstract
This paper describes a search for the single production of an up-type vector-like quark (T) decaying as T → Ht or T → Zt. The search utilises a dataset of pp collisions at √ s = 13 TeV collected with the ATLAS detector during the 2015–2018 data-taking period of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb−1 . Data are analysed in final states containing a single lepton with multiple jets and b-jets. The presence of boosted heavy resonances in the event is exploited to discriminate the signal from the Standard Model background. No significant excess above the Standard Model expectation is observed, and 95% CL upper limits are set on the production cross section of T quarks in different decay channels. The results are interpreted in several benchmark scenarios to set limits on the mass and universal coupling strength (κ) of the vector-like quark. For singlet T quarks, κ values above 0.53 are excluded for all masses below 2.3 TeV. At a mass of 1.6 TeV, κ values as low as 0.35 are excluded. For T quarks in the doublet scenario, where the production cross section is much lower, κ values above 0.72 are excluded for all masses below 1.7 TeV, and this exclusion is extended to κ above 0.55 for low masses around 1.0 TeV.
Item Metadata
Title |
Search for single production of vector-like T quarks decaying into Ht or Zt in pp collisions at √s = 13 TeV with the ATLAS detector
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Creator | |
Publisher |
Springer Berlin Heidelberg
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Date Issued |
2023-08-23
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Description |
This paper describes a search for the single production of an up-type vector-like
quark (T) decaying as T → Ht or T → Zt. The search utilises a dataset of pp collisions at
√
s = 13 TeV collected with the ATLAS detector during the 2015–2018 data-taking period
of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb−1
. Data
are analysed in final states containing a single lepton with multiple jets and b-jets. The
presence of boosted heavy resonances in the event is exploited to discriminate the signal
from the Standard Model background. No significant excess above the Standard Model expectation is observed, and 95% CL upper limits are set on the production cross section of T
quarks in different decay channels. The results are interpreted in several benchmark scenarios to set limits on the mass and universal coupling strength (κ) of the vector-like quark. For
singlet T quarks, κ values above 0.53 are excluded for all masses below 2.3 TeV. At a mass
of 1.6 TeV, κ values as low as 0.35 are excluded. For T quarks in the doublet scenario, where
the production cross section is much lower, κ values above 0.72 are excluded for all masses
below 1.7 TeV, and this exclusion is extended to κ above 0.55 for low masses around 1.0 TeV.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2023-11-08
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution 4.0 International (CC BY 4.0)
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DOI |
10.14288/1.0437564
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URI | |
Affiliation | |
Citation |
Journal of High Energy Physics. 2023 Aug 23;2023(8):153
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Publisher DOI |
10.1007/JHEP08(2023)153
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty
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Copyright Holder |
The Author(s)
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)