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

Journal of High Energy Physics 2026 Open access

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Authors: Georges Aad, Erlend Aakvaag, B. Abbott, Sara Abdelhameed, Kira Abeling, Nils Julius Abicht, S. H. Abidi, Mohammed Aboelela, A. Aboulhorma, H. Abramowicz, Y. Abulaiti, B M. Acharya
+88 more Anke Ackermann, Claire Adam Bourdarios, L. Adamczyk, Sagar Addepalli, Matthew John Addison, J. Adelman, Aytul Adiguzel, T. Adye, A. A. Affolder, Y. Afik, M. N. Agaras, A. Aggarwal, C. Agheorghiesei, F. Ahmadov, Sudha Ahuja, S. Ahuja, X. Ai, G. Aielli, A. Aikot, Malak Ait Tamlihat, B. Aitbenchikh, T. P. A. Åkesson, A. V. Akimov, Daiya Akiyama, Nilima Nilesh Akolkar, S. Aktas, Gian Luigi Alberghi, Justin E Albert, Una Helena Alberti, P. Albicocco, Guillaume Lucas Albouy, S. Alderweireldt, Zackary Lee Alegria, M. Aleksa, Igor V. Alexandrov, C. Alexa, T. Alexopoulos, Fabrizio Alfonsi, Malte Algren, M. Alhroob, B. Ali, Hanadi Ali, S. Ali, Samuel William Alibocus, Malik Aliev, G. Alimonti, Wael Alkakhi, C. Allaire, Benedict Allbrooke, Derrick Allen, Jonny Allen, Julia Frances Allen, P. P. Allport, Alberto Aloisio, F. Alonso, C. Alpigiani, Zainab Mohammad K Alsolami, Adrian Alvarez Fernandez, Mario Alves Cardoso, M. G. Alviggi, M. Aly, Yara Do Amaral Coutinho, A. Ambler, Christoph Amelung, Maximilian Amerl, Christoph Ames, Thiziri Amezza, D. Amidei, Baktash Amini, Kyle Amirie, Artem Amirkhanov, Susana Patricia Amor dos Santos, K. R. Amos, Dimitra Amperiadou, Shiwen An, C. Anastopoulos, T. Andeen, J. K. Anders, Adam Campbell Anderson, A. Andreazza, S. Angelidakis, Aaron Angerami, A. V. Anisenkov, A Annovi, C. Antel, E. Antipov, M. Antonelli, F. Anulli
DOI: 10.1007/jhep07(2026)107
Cited by: 0
References: 125

Abstract

A bstract Events with t -channel single top quarks are used to probe effective field theory operators in $$ \sqrt{s}=13 $$ 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.

Fields of Study & Subjects

Particle physics theoretical and experimental studies Quantum Chromodynamics and Particle Interactions Computational Physics and Python Applications

Publication details

Journal / source
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Volume
2026
Issue
7
Publication date
13 July 2026
Language
EN