UNSPECIFIED (2025) Combination of searches for singly produced vectorlike top quarks in collisions at √ =13 TeV with the ATLAS detector. Physical Review D, 111 (1): 012012. ISSN 2470-0010
Full text not available from this repository.Abstract
A combination of searches for the single production of vectorlike top quarks () is presented. These analyses are based on proton-proton collisions at √ =13 TeV recorded in 2015–2018 with the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb−1. The decay modes considered in this combination are into a top quark and either a Standard Model Higgs boson or a boson ( → and →). The individual searches used in the combination are differentiated by the number of leptons (, ) in the final state. The observed data are found to be in good agreement with the Standard Model background prediction. Interpretations are provided for a range of masses and couplings of the vectorlike top quark for benchmark models and generalized representations in terms of 95% confidence level limits. For a benchmark signal prediction of a vectorlike top quark SU(2) singlet with electroweak coupling, , of 0.5, masses below 2.1 TeV are excluded, resulting in the most restrictive limits to date.