A search for rare decay η′→4π0 has been performed with GAMS-4π Setup. The new upper limit for decay was established BR(η′→4π0)<3.2⋅10−4 at 90\% confidence level. The π−p charge-exchange reaction at 32.5 GeV/c was used as a source of 1.3⋅106η′ mesons. Experiment carried out at the IHEP U-70 accelerator.
@article{arxiv.1406.5057,
title = {A search for decay $\eta' \rightarrow 4 \pi^{0}$ with GAMS-$4\pi$ Setup},
author = {S. V. Donskov and V. N. Kolosov and A. A. Lednev and Yu. V. Mikhailov and V. A. Polyakov and V. D. Samoylenko and G. V. Khaustov},
journal= {arXiv preprint arXiv:1406.5057},
year = {2015}
}