"The K+[nu]3 and K+e3 Decay through a Current of Definite Isotopic Rank."

Offprint from:: Il Nuovo Cimento, Serie X, Vol. 24, 16 Maggio 1962., 1962. pp. 606-613. (240 x 170 mm). 8 pp. 4 figs. Stapled pages. Very good. Summary: The energy distribution and polarization of muons and electrons are calculated assuming an interaction through a vector current of definite isospin character, and using form factors obtained by means of dispersion relations. The effect of the K* resonance is taken into account. The spectra, and to a lesser extent the polarization, are quite insensitive to this effect.