Upper limit on the eta -> pi+pi- branching ratio with the KLOE experiment

Details Upper limit on the eta -> pi+pi- branching ratio with the KLOE experiment Upper limit on the eta -> pi+pi- branching ratio with the KLOE experiment

2004-11-08

arxiv.org/abs/hep-ex/0411030v2

Phys.Lett.B606:276-280,2005

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 3 figures

Scientific paper

10.1016/j.physletb.2004.12.025

We have searched with the KLOE detector for the P and CP violating decay eta
-> pi^+pi^- in a sample of 1.55 x 10^7 eta's from the decay phi -> eta gamma of
phi mesons produced in e+e- annihilations at DAFNE. No signal is found. We
obtain the upper limit BR(eta -> pi^+pi^-) < 1.3 x 10^-5 at 90% confidence
level.

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