A search for pair-produced vector-like quarks using events with exactly one lepton ($e$ or $\mu$), at least four jets including at least one $b$-tagged jet, and large missing transverse momentum is presented. Data from proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 13$ TeV, recorded by the ATLAS detector at the LHC from 2015 to 2018 and corresponding to an integrated luminosity of 139 fb$^{-1}$, are analysed. Vector-like partners $T$ and $B$ of the top and bottom quarks are considered, as is a vector-like $X$ with charge +5/3, assuming their decay into a $W$, $Z$, or Higgs boson and a third-generation quark. No significant deviations from the Standard Model expectation are observed. Upper limits on the production cross-section of $T$ and $B$ quark pairs as a function of their mass are derived for various decay branching ratio scenarios. The strongest lower limits on the masses are 1.59 TeV assuming mass-degenerate VLQs and branching ratios corresponding to the weak-isospin doublet model, and 1.47 TeV (1.46 TeV) for exclusive $T \rightarrow Zt$ ($B/X \rightarrow Wt$) decays. In addition, lower limits on the $T$ and $B$ quark masses are derived for all possible branching ratios.
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When using this data, please cite the original publication:
ATLAS
Collaboration
(2023).
Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector. Eur.Phys.J.C 83 (2023) 719.
Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector. HEPData (collection).
https://doi.org/10.17182/hepdata.137656
or, if you prefer, a specific version of the
record:
ATLAS
Collaboration
(2023).
Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.137656.v1
You can also cite the 10 data
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ATLAS
Collaboration
(2023).
“$TT \rightarrow ZtZt$ cross-section limits” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t1
ATLAS
Collaboration
(2023).
“$BB \rightarrow WtWt$ cross-section limits” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t2
ATLAS
Collaboration
(2023).
“$TT$ cross-section limits for the singlet model” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t3
ATLAS
Collaboration
(2023).
“$BB$ cross-section limits for the singlet model” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t4
ATLAS
Collaboration
(2023).
“$TT$ cross-section limits for the doublet model” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t5
ATLAS
Collaboration
(2023).
“$QQ$ cross-section limits for the doublet model” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t6
ATLAS
Collaboration
(2023).
“Expected lower limits on the VLT mass” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t7
ATLAS
Collaboration
(2023).
“Observed lower limits on the VLT mass” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t8
ATLAS
Collaboration
(2023).
“Expected lower limits on the VLB mass” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t9
ATLAS
Collaboration
(2023).
“Observed lower limits on the VLB mass” of “Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.137656.v1/t10
When using this data, please cite the original publication:
ATLAS
Collaboration
(2023).
Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector. Eur.Phys.J.C 83 (2023) 719.
or, if you prefer, a specific version of the
record:
You can also cite the 10 data
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individually.
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