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

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...

Full description

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
Description
Summary: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 taken into consideration. Its branching fraction is determined to be B(eta' -> e(+)e(-)e(+)e(-)) = (4.5 +/- 1.0(stat) +/- 0.5(sys)) x 10(-6).
Bibliography:Библиогр.: 29 назв.
ISSN:2470-0010

Similar Items