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Título

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

Palabras clave Exotics
Hadron-Hadron scattering (experiments)
vector-like quarks
Fecha de publicación 16-ago-2017
EditorSpringer
ResumenThe 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.
URI http://hdl.handle.net/10261/154436
DOI10.1007/JHEP08(2017)052
ISSN1029-8479
Aparece en las colecciones: Sponsoring Consortium for Open Access Publishing in Particle Physics - SCOAP3
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