Search for Pair Production of Vector-Like Top Quarks in Events with One Lepton, Jets, and Missing Transverse Momentum in √s=13 TeV PP Collisions with the ATLAS Detector

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Search for Pair Production of Vector-Like Top Quarks in Events with One Lepton, Jets, and Missing Transverse Momentum in √s=13 TeV PP Collisions with the ATLAS Detector

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Title: Search for Pair Production of Vector-Like Top Quarks in Events with One Lepton, Jets, and Missing Transverse Momentum in √s=13 TeV PP Collisions with the ATLAS Detector
Author(s):
Aaboud, M.;
Aad, G.;
Abbott, B.;
Abdinov, O.;
Abeloos, B.;
Abidi, S. H.;
AbouZeid, O. S.;
Izen, Joseph M.;
Meirose, Bernhard;
Reeves, Kendall;
ATLAS Collaboration
Date Created: 2017-04-16
Item Type: article
Keywords: Show Keywords
Abstract: The results of a search for vector-like top quarks using events with exactly one lepton, at least four jets, and large missing transverse momentum are reported. The search is optimised for pair production of vector-like top quarks in the Z(→νν) t + X decay channel. LHC pp collision data at a centre-of-mass energy of √s=13 TeV recorded by the ATLAS detector in 2015 and 2016 are used, corresponding to an integrated luminosity of 36.1 fb⁻¹. No significant excess over the Standard Model expectation is seen and upper limits on the production cross-section of a vector-like T quark pair as a function of the T quark mass are derived. The observed (expected) 95% CL lower limits on the T mass are 870 GeV (890 GeV) for the weak-isospin singlet model, 1.05 TeV (1.06 TeV) for the weak-isospin doublet model and 1.16 TeV (1.17 TeV) for the pure Zt decay mode. Limits are also set on the mass as a function of the decay branching ratios, excluding large parts of the parameter space for masses below 1 TeV.
Publisher: Springer Verlag
ISSN: 1126-6708
Source: Journal of High Energy Physics
Link to Related Resource: http://dx.doi.org/10.1007/JHEP08(2017)052
Persistent Link: http://hdl.handle.net/10735.1/6068
Bibliographic Citation: Aaboud, M., G. Aad, B. Abbott, et al. 2017. "Search for pair production of vector-like top quarks in events with one lepton, jets, and missing transverse momentum in √s=13 TeV pp collisions with the ATLAS detector." Journal of High Energy Physics 2017(8).
Terms of Use: CC BY 4.0 (Attribution)
©2017 CERN, for the ATLAS Collaboration

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CC BY 4.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 4.0 (Attribution)