Observation of the Dalitz decay η' → γe+e-

We report the first observation of the Dalitz decay η'→γe+e−, based on a data sample of 1.31 billion J/ψ events collected with the BESIII detector. The η' mesons are produced via the J/ψ→γη' decay process. The ratio Γ(η'→γe+e−)/Γ(η'→γγ) is measured to be (2.13±0.09(stat)±0.0...

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Bibliographic Details
Published in:Physical Review D Vol. 92, № 1. P. 012001-1-012001-11
Corporate Author: Томский государственный университет Радиофизический факультет Научные подразделения РФФ
Other Authors: Ablikim, M., Ai, X. C., Chelkov, G. A., Achasov, M. N.
Format: Article
Language:English
Subjects:
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000529862
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