Short-distance constraints in hadronic-light-by-light for the muon g − 2
In this talk recent progress in studying the short-distance properties of the hadronic light-by-light contribution to the muon g−2 is described. The intermediate and short-distance part contributes a large part of the error of the theoretical prediction as described in the white paper [1]. We showed that the massless quark-loop is the first term in a systematic expansion at short-distances, a resu