Speaker
Description
The K+ ==> pi0 mu+ nu gamma (Km3g) decay has been measured
with OKA setup at the RF-separated 17.7 GeV/c momentum kaon beam
of the U-70 accelerater. The data was collected in two run in 2012-2013 yrs.
and corresponds to the flux of 2.62e+10 "live" kaons entering the decay volume.
More than 900 signal events were found in the "standard" Particle Data
Group (PDG) region of 30-60 MeV energy of the emitted photon in the rest frame
of the decaing kaon. Using 4.48e+06 events sample of normalization decay
K+ ==> pi0 mu+ nu (Km3), the branching ratio B(km3g)/B(km3) was found to be
(4.49+/-0.37(stat))e-4. This value can be transformed (PDG B(km3)=3.352%)
to B(km3g)=(1.51+/-0.12(stat))e-5.
Our results are preliminary, with systematic errors are being estimated.
