Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at √s = 13TeV with the ATLAS detector Aaboud, M. Aguilar Saavedra, Juan Antonio Atlas Collaboration, / Hadron-Hadron scattering (experiments) A search for new phenomena in events with two same-charge leptons or three leptons and jets identified as originating from b-quarks in a data sample of 36.1 fb-1 of pp collisions at √s = 13TeV recorded by the ATLAS detector at the Large Hadron Collider is reported. No significant excess is found and limits are set on vector-like quark, four-top-quark, and same-sign top-quark pair production. The observed (expected) 95% CL mass limits for a vector-like T- and B-quark singlet are mT > 0.98 (0.99)TeV and mB > 1.00 (1.01)TeV respectively. Limits on the production of the vector-like T5/3-quark are also derived considering both pair and single production; in the former case the lower limit on the mass of the T5/3-quark is (expected to be) 1.19 (1.21)TeV. The Standard Model four-top-quark production cross-section upper limit is (expected to be) 69 (29) fb. Constraints are also set on exotic four-top-quark production models. Finally, limits are set on same-sign top-quark pair production. The upper limit on uu → tt production is (expected to be) 89 (59) fb for a mediator mass of 1TeV, and a dark-matter interpretation is also derived, excluding a mediator of 3TeV with a dark-sector coupling of 1.0 and a coupling to ordinary matter above 0.31. 2024-10-10T07:15:33Z 2024-10-10T07:15:33Z 2018-12-07 journal article The ATLAS collaboration., Aaboud, M., Aad, G. et al. Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at √s = 13TeV with the ATLAS detector. J. High Energ. Phys. 2018, 39 (2018). https://doi.org/10.1007/JHEP12(2018)039 https://hdl.handle.net/10481/95771 10.1007/JHEP12(2018)039 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional Springer Nature