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Measurement of the hadronic form factor in D0→K-e+νe decays
- Aubert, B;
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- et al.
Abstract
The shape of the hadronic form factor f+(q2) in the decay D0→K-e+νe has been measured in a model independent analysis and compared with theoretical calculations. We use 75fb-1 of data recorded by the BABAR detector at the PEP-II electron-positron collider. The corresponding decay branching fraction, relative to the decay D0→K-π+, has also been measured to be RD=B(D0→K-e+νe(γ))/B(D0→K-π+(γ))=0.927±0. 007±0.012. From these results, and using the present world average value for B(D0→K-π+), the normalization of the form factor at q2=0 is determined to be f+(0)=0.727±0.007±0.005±0.007 where the uncertainties are statistical, systematic, and from external inputs, respectively. © 2007 The American Physical Society.
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