Constraints on effective field theories via quadruple-differential angular decay rates from t-channel single-top-quark production at s = 13 TeV with the ATLAS detector

Events with t-channel single top quarks are used to probe effective field theory operators in s = 13 TeV proton–proton collision data corresponding to 140 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. To extract a maximum amount of information from these events, the joint fourfol...

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Authors: Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abulaiti, Y.; Acharya, B. S.; Ackermann, A.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V.; Addison, M. J.; Díaz, Marco A.; Garay Walls, Francisca
Format: Article
Status:Published version
Publication date:2026
Country:Chile
Institution:Pontificia Universidad Católica de Chile
Repository:Pontificia Universidad Católica de Chile
OAI Identifier:oai:repositorio.uc.cl:11534/110325
Online Access:https://doi.org/10.1007/JHEP07(2026)107
https://repositorio.uc.cl/handle/11534/110325
Access Level:Open access
Keyword:510
Matemática física y química
Summary:Events with t-channel single top quarks are used to probe effective field theory operators in s = 13 TeV proton–proton collision data corresponding to 140 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. To extract a maximum amount of information from these events, the joint fourfold probability distribution for four kinematic angles is simultaneously analysed. A method leveraging Fourier techniques to handle the challenges arising from this approach is employed. The relevant effective field theory operators are those sensitive to top-quark decay and t-channel production vertices. Their Wilson coefficients are tightly constrained, with results compatible with Standard Model predictions.

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