Browsing Elektrik-Elektronik Mühendisliği Bölümü Makale Koleksiyonu by Subject "U-Gamma"
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Measurement of B(J/psi -> eta ' e(+)e(-)) and search for a dark photon
(Amer Physical Soc., 2019)Using a data sample of (1310.6 +/- 7.0) x 10(6) J/psi decay events collected with the BESIII detector at BEPCII, we study the electromagnetic Dalitz decay J/psi -> eta ' e(+)e(-) with two dominant eta' decay modes, eta' ...