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Measurement of the form factors in the decay D^+ to ω e^+ ν_(e) and search for the decay D^+ to φ e^+ ν_(e)
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arxiv 1508.00151 v1 pith:6PN4QL2Q submitted 2015-08-01 hep-ex
Measurement of the form factors in the decay D^+ to ω e^+ ν_(e) and search for the decay D^+ to φ e^+ ν_(e)
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Using 2.92 fb$^{-1}$ of electron-positron annihilation data collected at a center-of-mass energy of $\sqrt{s}= 3.773$ GeV with the BESIII detector, we present an improved measurement of the branching fraction $\mathcal{B}(D^+ \to \omega e^+ \nu_{e}) = (1.63\pm0.11\pm0.08)\times 10^{-3}$. The parameters defining the corresponding hadronic form factor ratios at zero momentum transfer are determined for the first time, we measure them to be $r_V = 1.24\pm0.09\pm0.06$ and $r_2 = 1.06\pm0.15 \pm 0.05$. The first and second uncertainties are statistical and systematic, respectively. We also search for the decay $D^+ \to \phi e^+ \nu_{e}$. An improved upper limit $\mathcal{B}(D^+ \to \phi e^+ \nu_{e}) < 1.3 \times 10^{-5}$ is set at 90\% confidence level.
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Cited by 2 Pith papers
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A review of BESIII charmed meson decay studies presents the most precise averages for |V_cs|, |V_cd|, D and D_s decay constants, and several hadronic form factors from combined experimental results.
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