Search for the $$\boldsymbol{K^{+}\rightarrow}{\pi^{+}\pi^{0}\pi^{0}\gamma}$$ Decay

The $$K^{+}\to\pi^{+}\pi^{0}\pi^{0}\gamma$$ decay is observed by the OKA collaboration. The branching ratio is measured to be $$\left(3.3\pm 0.8(\textrm{stat.})\right)\times 10^{-6}$$ . The branching ratio and $$\gamma$$ energy spectrum are consistent with ChPT prediction.