Abstract
We report the first determination of the upper limit for the branching ratio of the CP forbidden decay η → 4π0. No events were observed in a sample of 3.0 × 107 η decays. The experiment was performed with the Crystal Ball multiphoton spectrometer installed in a separated p- beam at the AGS (Alternating Gradient Synchrotron). At the 90% confidence limit, B(η → 4π0) ≤ 6.9 × 10-7.
Original language | English (US) |
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Pages (from-to) | 4802-4805 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 84 |
Issue number | 21 |
DOIs | |
State | Published - 2000 |
ASJC Scopus subject areas
- General Physics and Astronomy