Updated pseudoscalar contributions to the hadronic light-by-light of the muon (g − 2)

Abstract

In this work, we present our recent results on a new and alternative data-driven determination for the hadronic light-by-light pseudoscalar pole contribution to the muon (g − 2). Our approach is based on Canterbury approximants, a rational approach to describe the required transition form factors, which provides a systematic and model-independent framework beyond traditional large-[Formula: see text] approaches. As a result, we obtain a competitive determination with errors according to future (g − 2) experiments including, for the first time, a well-defined systematic uncertainty.