Study of the Process e + e − → π 0 π 0 γ in c.m. Energy

V. M. Aulchenko,V. Sh. Banzarov, A. Baratt, L. M. Barkov,S. E. Baru,N. S. Bashtovoy,A. E. Bondar, D. V. Bondarev, A. V. Bragin,S. I. Eidelman,D. A. Epifanov, G. V. Fedotovitch,N. I. Gabyshev, D. A. Gorbachev,A. A. Grebeniuk,D. N. Grigoriev, F. V. Ignatov,S. V. Karpov,V. F. Kazanin,B. I. Khazin, I. A. Koop,P. P. Krokovny,A. S. Kuzmin,I. B. Logashenko,P. A. Lukin,A. P. Lysenko,K. Yu. Mikhailov, A. I. Milstein,I. N. Nesterenko, V. S. Okhapkin,A. V. Otboev,E. A. Perevedentsev,A. A. Polunin,A. S. Popov,S. I. Redin,N. I. Root,A. A. Ruban,N. M. Ryskulov,A. G. Shamov,Yu. M. Shatunov,B. A. Shwartz,A. L. Sibidanov,V. A. Sidorov,A. N. Skrinsky,I. G. Snopkov,E. P. Solodov,P. Yu. Stepanov,J. A. Thompson,A. A. Valishev,Yu. V. Yudin,A. S. Zaitsev, S. G. Zverev

semanticscholar（2003）

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Abstract

The cross section of the process e+e− → π0π0γ has been measured in the c.m. energy range 600–970 MeV with the CMD-2 detector. The following branching ratios have been determined: B(ρ0 → π0π0γ) = (5.2 −1.3 ± 0.6) × 10−5 and B(ω → π0π0γ) = (6.4 −2.0 ± 0.8) × 10−5. Evidence for the ρ0 → f0(600)γ decay has been obtained: B(ρ0 → f0(600)γ) = (6.0 −2.7 ± 0.9) × 10−5. From a search for the process e+e− → ηπ0γ the following upper limit has been obtained: B(ω → ηπ0γ) < 3.3 × 10−5 at 90% CL. Preprint submitted to Elsevier Science

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