Observation of the double Dalitz decay η′ → e+ e− e+ e−

Based on (0087 +/- 44) x 10(6) J/psi events collected with the BESIII detector at BEPCII, the double Dalitz decay eta' -> e(+)e(-)e(+)e(-) is observed for the first time via the J/psi -> gamma eta' decay process. The significance is found to be 5.7s with systematic uncertainties take...

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Bibliographic Details

Published in:	Physical Review D Vol. 105, № 11. P. 112010-1-112010-8
Other Authors:	Ablikim, M., Achasov, M. N., Adlarson, P., Chelkov, G. A.
Format:	Article
Language:	English
Subjects:	Далица двойной распад BESIII, детектор BEPCII, коллайдер статьи в журналах
Online Access:	http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001007868