Measurement of the eta->pi+pi-e+e- decay branching ratio
published by Andrzej Kup\\'s\\'c Dr
in 2006
and research's language is
English
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Abstract in English
The reaction pd->3He eta at threshold was used to provide a clean source of eta mesons for decay studies with the WASA detector at CELSIUS. The branching ratio of the decay eta->pi+pi-e+e- is measured to be (4.3+/-1.3+/-0.4)x10^-4.