Observation of $K^{+} \to \pi^{+}\pi^{0}\pi^{0}\gamma$ decay

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, 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

arXiv (Cornell University)（2023）

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摘要

The $K^{+} \to \pi^{+}\pi^{0}\pi^{0}\gamma$ 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 $\gamma$ energy spectrum are consistent with ChPT prediction.

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关键词

\pi^{+}\pi^{0}\pi^{0}\gamma$

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