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Search for same-charge top-quark pair production in pp collisions at √s = 13 TeV with the ATLAS detector

Aad G.
•
Aakvaag E.
•
Abbott B.
altro
Zwalinski L.
2025
  • journal article

Periodico
JOURNAL OF HIGH ENERGY PHYSICS
Abstract
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 Otu1, OQu1, and OQu8 operators in the Standard Model Effective Field Theory framework are derived.
DOI
10.1007/JHEP02(2025)084
Archivio
https://hdl.handle.net/11390/1312533
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-105012476132
https://ricerca.unityfvg.it/handle/11390/1312533
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
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