Abstract

Recent measurements at the Large Hadron Collider allow for a robust and precise characterisation of the electro-weak interactions of the top quark. We present the results of a global analysis at next-to-leading order precision including LHC, LEP/SLD and Tevatron data in the framework of the Standard Model Effective Field Theory. We include a careful analysis of the impact of correlations among measurements, as well as of the uncertainties in the Effective Field Theory setup itself. We find remarkably robust global fit results, with central values in good agreement with the Standard Model prediction, and 95% probability bounds on Wilson coefficients that range from ±0.35 to ±8 TeV−2. This result represents a considerable improvement over previous studies, thanks to the addition of differential cross-section measurements in associated production processes of top quarks and neutral gauge bosons.

Details

Title
The top quark electro-weak couplings after LHC Run 2
Author
Miralles, Víctor 1   VIAFID ORCID Logo  ; López, Marcos Miralles 1 ; Llácer, María Moreno 1   VIAFID ORCID Logo  ; Peñuelas, Ana 2 ; Perelló, Martin 1 ; Vos, Marcel 1 

1  Instituto de Física Corpuscular (IFIC), Universitat de València and CSIC, Paterna, Spain (GRID:grid.470047.0) (ISNI:0000 0001 2178 9889) 
2  Instituto de Física Corpuscular (IFIC), Universitat de València and CSIC, Paterna, Spain (GRID:grid.470047.0) (ISNI:0000 0001 2178 9889); Johannes Gutenberg University Mainz, PRISMA+ Cluster of Excellence, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000 0001 1941 7111) 
Pages
32
Publication year
2022
Publication date
Feb 2022
Publisher
Springer Nature B.V.
e-ISSN
10298479
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/JHEP02(2022)032
ProQuest document ID
2625923432
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.