Study of the Process e + e − → π 0 π 0 γ in c.m. Energy
نویسندگان
چکیده
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
منابع مشابه
Study of the Process e + e − → ωπ 0 → π 0 π 0 γ in c.m. Energy Range 920–1380 MeV at CMD-2
The cross section of the process e+e− → ωπ0 → π0π0γ has been measured in the c.m. energy range 920–1380 MeV with the CMD-2 detector. Its energy dependence is well described by the interference of the ρ(770) and ρ(1450) mesons decaying to ωπ0. Upper limits for the cross sections of the direct processes e+e− → π0π0γ, ηπ0γ have been set.
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