Short-distance constraints on the hadronic light-by-light

The muon g-2 has attracted much attention over the years due to an apparent tension between the theoretical Standard Model prediction and experimental measurements. Today this tension is questioned, as lattice QCD predicts a different result than the traditional dispersion theory approach for the hadronic vacuum polarisation. Dispersion theory and lattice QCD are also used for another contribution known as the hadronic light-by-light, and it is important to cross-check the independent methods here as well. The dispersive approach in particular uses model calculations to handle heavier intermediate states. These models can be constrained by short-distance constraints obtained with operator product expansion techniques of the underlying 4-point function defining the hadronic light-by-light. In this talk I will present an overview of our work on short-distance constraints for the hadronic light-by-light and the impact for the muon g-2.