Study of the process e+ e- ---> pi0 pi0 gamma in c.m. energy range 600-MeV to 970-MeV at CMD2

The cross section of the process e + e − → π 0 π 0 γ 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 (ρ 0 →π 0 π 0 γ)=(5.2 +1.5 −1.3 ±0.6)×10 −5 and B (ω→π 0 π 0 γ)=(6.4 +2.4 −2.0 ±0.8)×10 −5 . Evidence for the ρ 0 → f 0 (600) γ decay has been obtained: B (ρ 0 →f 0 (600)γ)=(6.0 +3.3 −2.7 ±0.9)×10 −5 . From a search for the process e + e − → ηπ 0 γ the following upper limit has been obtained: B (ω→ηπ 0 γ)<3.3×10 −5 at 90% CL.

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15 pages, 4 figures

electron positron: colliding beams
electron positron: annihilation
pi0: pair production
photon: associated production
eta: electroproduction
rho(770)0: radiative decay
omega(783): radiative decay
rho(770)0: branching ratio
omega(783): branching ratio
channel cross section: energy dependence

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