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).

Biography

Zhe Ren received his PhD from the Institute of Theoretical Physics, Chinese Academy of Sciences, and is currently a postdoctoral researcher at the University of Granada, Spain. His research focuses on physics beyond the Standard Model, particularly the Standard Model effective field theory and the study of the electroweak phase transition using finite-temperature effective field theory.

Inviter: Jiang-Hao Yu