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Study of the decays $D^+\rightarrow\eta^{(\prime)} e^+\nu_{e}$
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arxiv 1803.05570 v1 pith:2TUMSCN5 submitted 2018-03-15 hep-ex
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abstract
The charm semileptonic decays $D^+\to\eta e^+\nu_{e}$ and $D^+\to\eta'e^+\nu_{e}$ are studied with a sample of $e^+e^-$ collision data corresponding to an integrated luminosity of 2.93 fb$^{-1}$ collected at $\sqrt{s}$ = 3.773 GeV with the BESIII detector. We measure the branching fractions for $D^+\to\eta e^+\nu_{e}$ to be $(10.74\pm0.81\pm0.51)\times10^{-4}$, and for $D^+\to\eta'e^+\nu_{e}$ to be $(1.91\pm0.51\pm0.13)\times10^{-4}$, where the uncertainties are statistical and systematic, respectively. In addition, we perform a measurement of the form factor in the decay $D^+\to\eta e^+\nu_{e}$. All the results are consistent with those obtained by the CLEO-c experiment.
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