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:
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001007868
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245 1 0 |a Observation of the double Dalitz decay η′ → e+ e− e+ e−  |c M. Ablikim, M. N. Achasov, P. Adlarson [et al.] 
336 |a Текст 
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504 |a Библиогр.: 29 назв. 
520 3 |a 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). 
653 |a Далица двойной распад 
653 |a BESIII, детектор 
653 |a BEPCII, коллайдер 
655 4 |a статьи в журналах 
700 1 |a Ablikim, M. 
700 1 |a Achasov, M. N. 
700 1 |a Adlarson, P. 
700 1 |a Chelkov, G. A. 
773 0 |t Physical Review D  |d 2022  |g Vol. 105, № 11. P. 112010-1-112010-8  |x 2470-0010 
852 4 |a RU-ToGU 
856 4 |u http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001007868 
908 |a статья 
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