Studies of D+→{η′,η,}e +νe
2011
We report the first observation of the decay D⁺→η'e⁺νe in two analyses, which combined provide a branching fraction of B(D⁺→η'e⁺νe)=(2.16±0.53±0.07)×10⁻⁴. We also provide an improved measurement of B(D⁺→ηe⁺νe)=(11.4±0.9±0.4)×10⁻⁴, provide the first form factor measurement, and set the improved upper limit B(D⁺→Φe⁺νe)<0.9×10⁻⁴ (90%C.L.).
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