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...
Published in: | Physical Review D Vol. 92, № 1. P. 012001-1-012001-11 |
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Corporate Author: | |
Other Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000529862 Перейти в каталог НБ ТГУ |