@misc{10481/84841,
year = {2023},
month = {8},
url = {https://hdl.handle.net/10481/84841},
abstract = {A search for pair-produced vector-like quarks using events with exactly one lepton (e or μ), 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 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 vector-like quarks and branching ratios corresponding to the weak-isospin doublet model, and 1.47 TeV (1.46 TeV) for exclusive T→ Zt (B/ X→ Wt) decays. In addition, lower limits on the T and B quark masses are derived for all possible branching ratios.},
organization = {EU-ESF},
organization = {GenT Programmes Generalitat Valenciana, Spain},
organization = {La Caixa Banking Foundation},
organization = {PROMETEO},
organization = {H2020 Marie Skłodowska-Curie Actions
 	MSCA},
organization = {CERN},
organization = {European Research Council
 
 	ERC},
organization = {European Cooperation in Science and Technology
 	COST},
organization = {Generalitat de Catalunya},
organization = {Agencia Nacional de Promoción Científica y Tecnológica
 	ANPCyT},
organization = {Ministerio de Ciencia e Innovación
 	MICINN},
organization = {Horizon 2020},
organization = {European Regional Development Fund
 	ERDF},
organization = {Agencia Nacional de Investigación y Desarrollo
 	ANID},
organization = {PIC (Spain)},
publisher = {Springer Nature},
title = {Search for pair-produced vector-like top and bottom partners in events with large missing transverse momentum in pp collisions with the ATLAS detector},
doi = {10.1140/epjc/s10052-023-11790-7},
author = {Aad, Georges and Aguilar Saavedra, Juan Antonio and Rodríguez Chala, Mikael and Atlas Collaboration},
}