Journal of High Energy Physics > 2017 > 2017 > 8 > 1-40
Search for pair production of vector-like top quarks in events with one lepton, jets, and missing transverse momentum in s = 13 $$ \sqrt{s}=13 $$ TeV pp collisions with the ATLAS detector
Source
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 $$ \sqrt{s}=13 $$ 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.
Identifiers
journal e-ISSN : | 1029-8479 |
DOI | 10.1007/JHEP08(2017)052 |
Authors
The ATLAS collaboration
- University Politehnica Bucharest, Bucharest, Romania
- Universidade Nova de Lisboa, Dep Fisica and CEFITEC of Faculdade de Ciencias e Tecnologia, Caparica, Portugal
- Centre National de l’Energie des Sciences Techniques Nucleaires, Rabat, Morocco
- CERN, Geneva 23, Switzerland
B. Abbott
- University of Oklahoma, Homer L. Dodge Department of Physics and Astronomy, Norman, United States of America