EPJ Web of Conferences 218, 01001 (2019)
https://doi.org/10.1051/epjconf/201921801001

Hadronic light-by-light scattering in the muon g − 2

PRISMA Cluster of Excellence and Institut für Kernphysik, Johannes Gutenberg-Universität, D-55128 Mainz, Germany

^* e-mail: nyffeler@uni-mainz.de

Published online: 18 October 2019

Abstract

We briefly review the current status of the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon. Based on various model calculations in the literature, we obtain the estimate ${{\displaystyle a}}_{\mu }^{HLbL}=(102\pm 39)\times {{\displaystyle 10}}^{-11}$. Recent developments including more model-independent approaches using dispersion relations and lattice QCD, that could lead to a more reliable estimate, are also discussed.