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Measurement of the form factors in the decay $D^+ \to \omega e^+ \nu_e$ and search for the decay $D^+ \to \phi e^+ \nu_e$

Submit Time: 2016-09-10
Author: Ablikim, M. and others 1 ;
Institute: 1.BESIII Collaboration;


Using 2.92 fb?1?of electron-positron annihilation data collected at a center-of-mass energy of?s√=3.773?GeV with the BESIII detector, we present an improved measurement of the branching fraction?B(D+→ωe+νe)=(1.63±0.11±0.08)×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?rV=1.24±0.09±0.06?and?r2=1.06±0.15±0.05. The first and second uncertainties are statistical and systematic, respectively. We also search for the decay?D+→?e+νe. An improved upper limit?B(D+→?e+νe)<1.3×10?5?is set at 90\% confidence level.
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Keywords: BESIII; ;
Recommended references: Ablikim, M. and others.(2016).Measurement of the form factors in the decay $D^+ \to \omega e^+ \nu_e$ and search for the decay $D^+ \to \phi e^+ \nu_e$.[ChinaXiv:201609.00614] (Click&Copy)
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[V1] 2016-09-10 08:41:20 chinaXiv:201609.00614V1 Download
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