New Precise Measurement of the Pion Weak Form Factors in the Pi+ -> e+ nu gamma Decay

M. Bychkov, D. Počanić, B. A. VanDevender +29

We have measured the ${\pi }^{+}\to {\mathrm{e}}^{+}\nu \gamma$ branching ratio over a wide region of phase space, based on a total of 65,460 events acquired using the PIBETA detector. Minimum-${\chi }^2$ fit…