en
Scientific article
Open access
English

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

ContributorsATLAS Collaboration
Published inJournal of High Energy Physics, vol. 1708, p. 052-092
Collection
  • Open Access - SCOAP3
Publication date2017
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.

Keywords
  • Exotics
  • Hadron-Hadron scattering (experiments)
  • Vector-like quarks
Citation (ISO format)
ATLAS Collaboration. 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. In: Journal of High Energy Physics, 2017, vol. 1708, p. 052–092. doi: 10.1007/JHEP08(2017)052
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal1029-8479
353views
105downloads

Technical informations

Creation09/01/2017 1:18:46 PM
First validation09/01/2017 1:18:46 PM
Update time03/15/2023 1:58:15 AM
Status update03/15/2023 1:58:15 AM
Last indexation02/12/2024 11:28:04 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack