The top quark electro-weak couplings after LHC Run 2

Journal of High Energy Physics

Martin Perelló¹  Marcel Vos¹  Marcos Miralles López¹  Víctor Miralles¹  María Moreno Llácer¹  Ana Peñuelas² 

[1] Instituto de Física Corpuscular (IFIC), Universitat de València and CSIC, C/ Catedrático José Beltrán 2, E-46980, Paterna, Valencia, Spain;Instituto de Física Corpuscular (IFIC), Universitat de València and CSIC, C/ Catedrático José Beltrán 2, E-46980, Paterna, Valencia, Spain;PRISMA+ Cluster of Excellence, Johannes Gutenberg University Mainz, Staudingerweg 9, 55128, Mainz, Germany;

关键词: Phenomenology of Field Theories in Higher Dimensions;   

DOI  :  10.1007/JHEP02(2022)032

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY