Seminar: ‘NLO Running in the SMEFT’

Title: ‘NLO Running in the SMEFT’

Speaker: Lukas Born (University of Bern).

Venue&Time: Red Room / 15:00

Abstract: The Standard Model Effective Field Theory (SMEFT) provides a systematic framework for parameterizing heavy new physics in a model-independent way. A central ingredient for precision analyses within this framework is the renormalization group equations (RGEs), governing the running of the Wilson coefficients across energy scales. Our recent computation of the two-loop β-functions in the SMEFT marks a milestone in this program, opening the door to genuine next-to-leading order (NLO) analyses.

In this talk, I will first discuss the key technical challenges we encountered in our calculation, how we addressed them by modifying the Warsaw basis, and the consistency checks on our results. Second, I will turn to a concrete phenomenological application, demonstrating that NLO running effects play an important role in Electroweak Precision Observables (EWPO).