It is known experimentally that, relative to the normal pion decay mode π→ μ+ ν, the
branching ratios ρ and ρ γ for the alternate decay modes π→ e+ ν and π→ e+ ν+ γ are very …

A quantitative study of π→ μ+ ν decay is presented using the techniques of dispersion
theory. The discussion is based on a model in which the decay occurs through pion …

The conserved-vector-current hypothesis, together with measured nuclear beta-decay rates,
predicts a value of the rate for the decay π+→ π 0 e+ ν of 0.4027±0.0018 s− 1. Using a …

Using the current value for the pion lifetime, we have recomputed the branching ratio for π→
e ν decay obtained from the 1963 experiment of Di Capua et al. and find Γ (π→ e ν+ π→ e ν …

A new measurement of the branching ratio (π+→ e++ ν)(π+→ μ++ ν) has been completed. A
double-focussing magnetic spectrometer was used to observe the spectra of electrons …

The conserved-vector-current hypothesis, together with measured nuclear-beta-decay rates,
predicts a value of the rate for the decay π+→ π 0 e+ ν of 0.4027±0.0018 s− 1. With use of a …

The branching ratio for the decay π→ e ν γ has been measured in a counter experiment in
which the e+ was detected in a magnetic spectrometer and the γ ray in a lead-glass …

The amplitude for pion decay is related to quantities involved in the meson propagator under
the strong π coupling alone. For pseudovector π coupling the Goldberger and Treiman …

The branching ratio for the decay π→ eνγ has been measured in a counter experiment in
which the e+ was detected in a magnetic spectrometer and the γ-ray in a lead-glass …

We re-examine the model of Gell-Mann, Sharp, and Wagner for relating the ω→ π++ π−+ π
0 decay rate to the π 0 lifetime. It is shown that, if present experimental results, finding large …