Renormalisation group evolution effects on global SMEFT analyses

TL;DR

This paper examines how renormalisation group evolution influences global SMEFT analyses, highlighting the importance of energy scale considerations and NLO predictions in disentangling Wilson coefficients for new physics searches.

Contribution

It investigates the impact of RGE on global SMEFT fits under minimal flavour violation, emphasizing the role of NLO predictions in resolving degeneracies.

Findings

RGE effects significantly alter Wilson coefficient correlations.

NLO SMEFT predictions help break degeneracies caused by RGE.

Energy scale dependence is crucial in global SMEFT analyses.

Abstract

Global analyses in the Standard Model Effective Field Theory (SMEFT) framework serve as a tool to probe potential directions of new physics. To break degeneracies between the Wilson coefficients of the SMEFT, it is essential to combine observables from various experiments. Since different observables entering global fits may be measured at different energy scales, it becomes increasingly important to account for this fact through the renormalisation group evolution (RGE) of the Wilson coefficients. In this work, we investigate the effects of the RGE on a global SMEFT fit under the assumption of a $U(3)^5$ symmetry within the minimal flavour violation framework. We comment on the role of next-to-leading order SMEFT predictions for breaking potential degeneracies between Wilson coefficients arising as a result of RGE effects.