CP3 Seminar - Zhe Ren - Renormalizing SMEFT to dimension eight with ABC4EFT

by Zhe Ren (CP3 - UCLouvain)

Tuesday 29 Sept 2026, 13:00 → 14:00 Europe/Brussels

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

The Standard Model Effective Field Theory (SMEFT) provides a systematic framework for parameterizing heavy new physics in a model-independent way. We compute the one-loop running of dimension-eight two-fermion operators induced by pairs of dimension-six terms and dimension-eight terms in the SMEFT. The calculation is performed off shell, for which we obtain and provide a new and explicitly Hermitian basis of dimension-eight Green' s functions. The analysis involves a large set of redundant operators, introducing significant technical complexity and making the computation error-prone. We overcome the difficulty by utilizing various SMEFT tools, especially the Amplitude Basis Construction for Effective Field Theories (ABC4EFT).

Zoom: https://cern.zoom.us/j/62591938215?pwd=qSqjURfb693pfZR7aFvYR2vJw3YnuD.1