Hadronic light-by-light scattering in the anomalous magnetic moment of the muon

Abstract

Hadronic light-by-light scattering in the anomalous magnetic moment of the muon $a_{\mu }$ is one of two hadronic effects limiting the precision of the Standard Model prediction for this precision observable, and hence the new-physics discovery potential of direct experimental determinations of $a_{\mu }$. In this contribution, we report on recent progress in the calculation of this effect achieved both via dispersive and lattice QCD methods.

14 pages, 7 figures; submitted as proceedings contribution for the 15th International Workshop on Tau Lepton Physics