Measurement of the Hadronic Form Factor in D0 --> K- e+ nue Decays

Details Measurement of the Hadronic Form Factor in D0 --> K- e+ nue Decays Measurement of the Hadronic Form Factor in D0 --> K- e+ nue Decays

2007-03-31

arxiv.org/abs/0704.0020v1

Phys.Rev.D76:052005,2007

Physics

High Energy Physics

High Energy Physics - Experiment

21 pages, 13 postscript figures, submitted to Phys. Rev. D, contributed to 42nd Rencontres de Moriond: QCD and Hadronic Intera

Scientific paper

doi:10.1103/PhysRevD.76.052005

The shape of the hadronic form factor f+(q2) in the decay D0 --> K- e+ nue has been measured in a model independent analysis and compared with theoretical calculations. We use 75 fb(-1) of data recorded by the BABAR detector at the PEPII electron-positron collider. The corresponding decay branching fraction, relative to the decay D0 --> K- pi+, has also been measured to be RD = BR(D0 --> K- e+ nue)/BR(D0 --> K- pi+) = 0.927 +/- 0.007 +/- 0.012. From these results, and using the present world average value for BR(D0 --> K- pi+), 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.

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