Author:
Artamonov A. V.,Bychkov V. N.,Donskov S. V.,Filin A. P.,Filippov S. N.,Gorin A. M.,Gushchin E. N.,Inyakin A. V.,Kekelidze G. D.,Khaustov G. V.,Kholodenko S. A.,Khudyakov A. A.,Kolosov V. N.,Kravtsov V. I.,Kudenko Yu. G.,Kulik A. V.,Kurshetsov V. F.,Lishin V. A.,Lysan V. M.,Medynsky M. V.,Obraztsov V. F.,Okhotnikov A. V.,Polyakov V. A.,Polyarush A. Yu.,Romanovsky V. I.,Rykalin V. I.,Sadovsky A. S.,Samoylenko V. D.,Shapkin M. M.,Tiurin I. S.,Uvarov V. A.,Yushchenko O. P.,Zalikhanov B. Zh.
Abstract
AbstractThe $$K^{+} \rightarrow \pi ^{+}\pi ^{0}\pi ^{0}\gamma $$
K
+
→
π
+
π
0
π
0
γ
decay is observed by the OKA collaboration. About 60 events of the decay observed with signal:noise $$\approx 1$$
≈
1
. The branching ratio obtained by normalization to $$K^{+} \rightarrow \pi ^{+}\pi ^{0}\pi ^{0}$$
K
+
→
π
+
π
0
π
0
is measured to be $$(3.7 \pm 0.9(stat) \pm 0.3(syst))\times 10^{-6}$$
(
3.7
±
0.9
(
s
t
a
t
)
±
0.3
(
s
y
s
t
)
)
×
10
-
6
for $$E_{\gamma }^*>10\,\textrm{MeV}$$
E
γ
∗
>
10
MeV
. The branching ratio, $$\gamma $$
γ
energy spectrum and angular distribution are consistent with ChPT prediction.
Publisher
Springer Science and Business Media LLC
Reference12 articles.
1. D’Ambrosio et al., Z. Phys. C 76, 301–310 (1997)
2. V.N. Bolotov et al., Pisma Zh. Exp. Theor. Fiz 42, 390–392 (1985)
3. M.M. Shapkin et al., Eur. Phys. J. C 79(4), 296 (2019)
4. J. Bijnens, F. Borg, EPJ C 40, 383–394 (2005)
5. B. Powell et al., Nucl. Instrum. Methods 198, 217 (1982)