0619742 - FZÚ 2026 RIV DE eng J - Journal Article
Aad, G. - Aakvaag, E. - Abbott, B. - Chudoba, Jiří - Federičová, Pavla - Hejbal, Jiří - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Nechanský, Filip - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2899 authors
Search for same-charge top-quark pair production in pp collisions at √s=13 TeV with the ATLAS detector.
Journal of High Energy Physics. Roč. 2025, č. 2 (2025), č. článku 084. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA MŠMT(CZ) EH22_008/0004632
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : Hadron-Hadron Scattering * ATLAS * CERN
OECD category: Particles and field physics
Impact factor: 5, year: 2023 ; AIS: 0.998, rok: 2023
Method of publishing: Open access
DOI: https://doi.org/10.1007/JHEP02(2025)084

A search for the production of top-quark pairs with the same electric charge (tt or tt‾) is presented. The analysis uses proton-proton collision data at √s ​ = 13 TeV, recorded by the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb−1. Events with two same-charge leptons and at least two b-tagged jets are selected. Neural networks are employed to define two selections sensitive to additional couplings beyond the Standard Model that would enhance the production rate of same-sign top-quark pairs. No significant signal is observed, leading to an upper limit on the total production cross-section of same-sign top-quark pairs of 1.6 fb at 95% confidence level. Corresponding limits on the three Wilson coefficients associated with the Otu(1)​, OQu(1)​, and OQu(8)​ operators in the Standard Model Effective Field Theory framework are derived.
Permanent Link: https://hdl.handle.net/11104/0366396