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Phys Rev Lett ; 84(21): 4802-5, 2000 May 22.
Article in English | MEDLINE | ID: mdl-10990802

ABSTRACT

We report the first determination of the upper limit for the branching ratio of the CP forbidden decay eta-->4pi(0). No events were observed in a sample of 3.0x10(7) eta decays. The experiment was performed with the Crystal Ball multiphoton spectrometer installed in a separated pi(-) beam at the AGS (Alternating Gradient Synchrotron). At the 90% confidence limit, B(eta-->4pi(0))

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