Review of Recent Calculations of the Hadronic Vacuum Polarisation Contribution

Abstract

Recent calculations of the hadronic vacuum polarisation contribution are reviewed. The focus is put on the leading-order contribution to the muon magnetic anomaly involving $e^{+}{e}^{-}$ annihilation cross section data as input to a dispersion relation approach. Alternative calculation including tau data is also discussed. The $\tau$ data are corrected for various isospin-breaking sources which are explicitly shown source by source.

Comments: 8 pages, 9 figures, 3 tables, invited talk given at the FCCP 2015 workshop