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η puzzle: the decay η →π°γγ

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Lettere al Nuovo Cimento (1971-1985)

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Davtdov, V.A., Donskov, S.V., Inyakin, A.V. et al. η puzzle: the decay η →π°γγ. Lett. Nuovo Cimento 32, 45–49 (1981). https://doi.org/10.1007/BF02745110

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