Study of K +. p0e+.. decay with OKA setup

Results of a study of the K+->pi 0e+nu gamma decay at OKA setup are presented. More than 32,000 events of this decay are observed. The differential spectra over the photon energy and the photon-electron opening angle in kaon rest frame are presented. The branching ratios, normalized to that of Ke3 decay are calculated for different cuts on E gamma and cos Theta e gamma. In particular, the branching ratio for E gamma>30 MeV and Theta e gamma>20 degrees is measured R = Br(K+->pi 0e+nu e gamma)Br(K+->pi 0e+nu e) = = (0.587 +/- 0.010(stat.)+/- 0.015(syst.))x10-2, which is in a good agreement with ChPT O(p4) calculations.

Automated summary

The study on K+->pi 0e+nu gamma decay at the OKA setup observed over 32,000 events, presenting differential spectra over photon energy and photon-electron opening angle. Branching ratios were calculated for different cuts on energy and opening angle, with a specific measurement showing good agreement with theoretical calculations.