Observation of $K^{+} \to π^{+}π^{0}π^{0}γ$ decay
hep-ex
/ Authors
S. N. Filippov, E. N. Gushchin, A. A. Khudyakov, V. I. Kravtsov, Yu G. Kudenko, A. V. Kulik, A. Yu. Polyarush, A. V. Artamonov, S. V. Donskov, A. P. Filin
and 22 more authors
A. M. Gorin, A. V. Inyakin, G. V. Khaustov, S. A. Kholodenko, V. N. Kolosov, V. F. Kurshetsov, V. A. Lishin, M. V. Medynsky, V. F. Obraztsov, A. V. Okhotnikov, V. A. Polyakov, V. I. Romanovsky, V. I. Rykalin, A. S. Sadovsky, V. D. Samoylenko, I. S. Tiurin, V. A. Uvarov, O. P. Yushchenko, V. N. Bychkov, G. D. Kekelidze, V. M. Lysan, B. Zh. Zalikhanov
/ Abstract
The $K^{+} \to π^{+}π^{0}π^{0}γ$ decay is observed by the OKA collaboration. The branching ratio is measured to be $(4.1 \pm 0.9(stat) \pm 0.4(syst))\times 10^{-6}$. The branching ratio and $γ$ energy spectrum are consistent with ChPT prediction.