Differential cross-section measurements of coherent production of singly and doubly resonant top-quark in WWbb events with one lepton at s=13 TeV with the ATLAS detector


Aad, G ORCID: 0000-0002-6665-4934, Aakvaag, E ORCID: 0000-0001-7616-1554, Abbott, B ORCID: 0000-0002-5888-2734, Abdelhameed, S ORCID: 0000-0002-0287-5869, Abeling, K ORCID: 0000-0002-1002-1652, Abicht, NJ ORCID: 0000-0001-5763-2760, Abidi, SH ORCID: 0000-0002-8496-9294, Aboelela, M ORCID: 0009-0003-6578-220X, Aboulhorma, A ORCID: 0000-0002-9987-2292, Abramowicz, H ORCID: 0000-0001-5329-6640 et al (show 90 more authors) (2026) Differential cross-section measurements of coherent production of singly and doubly resonant top-quark in WWbb events with one lepton at s=13 TeV with the ATLAS detector Journal of High Energy Physics, 2026 (7). 28-. ISSN 1126-6708, 1029-8479

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Abstract

This paper presents differential cross-section measurements of events containing a charged lepton, missing transverse momentum, two b-jets, and two light jets, consistent with the W+W−bb¯ final state. The analysis is based on 140 fb−1 of proton-proton collision data at s=13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider (2015–2018). Differential cross-sections are unfolded at particle level for a range of kinematic observables and in three kinematic regions. Both regions and observables are optimised for sensitivity to the interference between W+W−bb¯ produced with singly and doubly resonant top quarks. Results are compared with various theoretical predictions and deviations are observed in regions sensitive to the interference between singly and doubly resonant top-quark production. The unfolded results provide new information about the modelling of interference and off-shell effects of the W+W−bb¯ final state, improving the understanding of top-quark production mechanisms and providing new inputs for future Monte Carlo generator development.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Faculty of Science & Engineering > School of Physical Sciences > Physics
Depositing User: Symplectic Admin
Date Deposited: 27 Jul 2026 10:29
Last Modified: 03 Aug 2026 01:57
DOI: 10.1007/JHEP07(2026)028
Open Access URL: https://link.springer.com/article/10.1007/JHEP07(2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3199546
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