Speaker
Martin Hoferichter
(University of Bern)
Description
By far the biggest contribution to hadronic vacuum polarization (HVP) arises from the two-pion channel. Its quark-mass dependence can be evaluated by combining dispersion relations with chiral perturbation theory, providing guidance on the functional form of chiral extrapolations, or even interpolations around the physical point. In addition, the approach allows one to estimate in a controlled way the isospin-breaking corrections that arise from the pion mass difference. As an application, I will present an updated estimate of phenomenological expectations for electromagnetic and strong isospin-breaking corrections to the HVP contribution in the anomalous magnetic moment of the muon.
Primary author
Martin Hoferichter
(University of Bern)
