APS » PROLA » Phys. Rev. Lett. » Volume 84 » Issue 21

Phys. Rev. Lett. 84, 4802 - 4805 (2000)

Search for the CP Forbidden Decay η→4π0
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S. Prakhov et al. (Crystal Ball Collaboration)
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Received 3 December 1999

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 π- beam at the AGS (Alternating Gradient Synchrotron). At the 90% confidence limit, B(η→4π0)≤6.9×10-7.


©2000 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v84/p4802
DOI: 10.1103/PhysRevLett.84.4802
PACS: 11.30.Er, 14.40.Aq

* On leave of absence from Joint Institute for Nuclear Research, Dubna, Moscow Region, Russia.

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