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The $ϕ(1020)\toπ^0π^0γ$ decay

M. N. Achasov·S. E. Baru·K. I. Beloborodov·A. V. Berdyugin·A. V. Bozhenok·A. D. Bukin·D. A. Bukin·S. V. Burdin·T. V. Dimova·A. A. Drozdetsky·V. P. Druzhinin·M. S. Dubrovin·I. A. Gaponenko·V. B. Golubev·V. N. Ivanchenko·A. A. Korol·I. A. Koop·S. V. Koshuba·G. A. Kukartsev·A. A. Mamutkin·E. V. Pakhtusova·A. A. Salnikov·S. I. Serednyakov·V. V. Shary·Yu. M. Shatunov·V. A. Sidorov·Z. K. Silagadze·A. N. Skrinsky·A. A. Valishev·A. V. Vasiljev
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Abstract

In the SND experiment at VEPP-2M $e^+e^-$ collider the $ϕ(1020)\toπ^0π^0γ$ decay was studied and its branching ratio was measured: $B(ϕ\toπ^0π^0γ)=(1.221\pm 0.098\pm0.061)\cdot10^{-4}$. It was shown, that $f_0(980)γ$ intermediate state dominates in this decay and the $f_0(980)$-meson parameters were obtained.

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M. N. Achasov, S. E. Baru, K. I. Beloborodov, A. V. Berdyugin, A. V. Bozhenok, A. D. Bukin, D. A. Bukin, S. V. Burdin, T. V. Dimova, A. A. Drozdetsky, V. P. Druzhinin, M. S. Dubrovin, I. A. Gaponenko, V. B. Golubev, V. N. Ivanchenko, A. A. Korol, I. A. Koop, S. V. Koshuba, G. A. Kukartsev, A. A. Mamutkin, E. V. Pakhtusova, A. A. Salnikov, S. I. Serednyakov, V. V. Shary, Yu. M. Shatunov, V. A. Sidorov, Z. K. Silagadze, A. N. Skrinsky, A. A. Valishev, A. V. Vasiljev. 2000-05-11. The $ϕ(1020)\toπ^0π^0γ$ decay. https://doi.org/10.1016/s0370-2693(00)00705-x

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