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IHEP 2014 - 2 (In Russian) | |
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S.V.Donskov,
V.N.Kolosov,
A.A.Lednev,
Yu.V.Mikhailov,
V.A.Polyakov,
V.D.Samoilenko
G.V.Khaustov
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A search for rare decay $\eta' \rightarrow 4 \pi^{0}$ with GAMS-4$\pi$ Setup |
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| Protvino, 2014. – p. 7, figs. 4, refs.: 20. | ||
A new search for rare decay $\eta' \rightarrow 4 \pi^{0}$ has been performed with GAMS-4$\pi$ Setup. The new upper limit for decay was established $BR(\eta' \rightarrow 4 \pi^{0}) \textless 3.2 \cdot 10^{-4}$ at 90\% confidence level. The $\pi^{-} p$ charge-exchange reaction at 32.5 GeV/c was used as a source of $1.3\cdot 10^{6}$ $ \eta'$ mesons. Experiment carried out at the IHEP U-70 accelerator.
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