Helmut Paul

Electron Decay of the Pion

A. Tollestrup, T. Fazzini, G. Fidecaro, 1958 .

Search for the decay μ → e+γ and observation of the decay\(\mu \to e + v + \bar v + \gamma \)

N. H. Lipman, J. Ashkin, T. Fazzini, 1959 .