Measurement of decay branching ratio in mesons indicates contributions from various sources.
We have measured the branching ratio BR(Φ → π^0 π^0 γ) with the KLOE detector using a sample of ~5x10^7Φ decays.Φ mesons are produced at DAFNE, the Frascati Φ-factory. We find BR(Φ → π^0 π^0 γ) = ( 1.09 ± 0.03(stat) ± 0.05(syst) )x10^-4. We fit the two--pion mass spectrum to models to disentangle contributions from various sources.
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A. et al. (2002) studied this question.
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