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Observation of the decay PHI(1020)--->OMEGA+PI0

M. N. Achasov·S. E. Baru·A. V. Berdyugin·A. V. Bozhenok·D. A. Bukin·S. V. Burdin·T. V. Dimova·S. I. Dolinsky·V. P. Druzhinin·M. S. Dubrovin·I. A. Gaponenko·V. B. Golubev·V. N. Ivanchenko·A. A. Korol·M. S. Korostelev·S. V. Koshuba·E. V. Pakhtusova·A. A. Polunin·E. E. Pyata·A. A. Salnikov·V. V. Shary·S. I. Serednyakov·Yu. M. Shatunov·V. A. Sidorov·A. N. Skrinsky·Z. K. Silagadze·Yu. S. Velikzhanin
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Abstract

The reaction e^+e^- ---> OMEGA+PI0 ---> PI+PI- 2PI0 has been studied with SND detector at VEPP-2M e^+e^- collider in the vicinity of the PHI(1020) meson resonance. The observed interference pattern in the energy dependence of the cross section is consistent with existence of the decay PHI ---> OMEGA+PI0 with a branching ratio of B(PHI ---> OMEGA+PI0)=(4.8+1.9-1.7+-0.8)x10^{-5}. The real and imaginary parts of the decay amplitude were measured. The PHI ---> OMEGA+PI0 decay was observed for the first time.

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M. N. Achasov, S. E. Baru, A. V. Berdyugin, A. V. Bozhenok, D. A. Bukin, S. V. Burdin, T. V. Dimova, S. I. Dolinsky, V. P. Druzhinin, M. S. Dubrovin, I. A. Gaponenko, V. B. Golubev, V. N. Ivanchenko, A. A. Korol, M. S. Korostelev, S. V. Koshuba, E. V. Pakhtusova, A. A. Polunin, E. E. Pyata, A. A. Salnikov, V. V. Shary, S. I. Serednyakov, Yu. M. Shatunov, V. A. Sidorov, A. N. Skrinsky, Z. K. Silagadze, Yu. S. Velikzhanin. 1999-01-14. Observation of the decay PHI(1020)--->OMEGA+PI0. https://doi.org/10.1016/s0370-2693(99)00043-x

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