SIMPLE ANALYTIC FORMULA FOR THE HADRONIC CONTRIBUTION TO THE PHOTONICVACUUM POLARIZATION

Knowledge of the hadronic contribution to the photonic vacuum polariza tion is required for calculating radiative corrections in electroweak theory. A simple model is proposed that reproduces the value <(alpha)o ver bar> = alpha(m(Z)(2)) obtained by integrating experimental data on the transition sigma(e+e--->hadrons). High-accuracy measurement of th e muon magnetic moment would refine the parameters of our model in the energy range 1 GeV < E < 2 GeV, which is crucial for reducing errors in <(alpha)over bar>.