# Measurement of the Hadronic Form Factor in $D^0 \to K^- e^+ \nu_e$ Decays

Abstract : 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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http://hal.in2p3.fr/in2p3-00169504
Contributor : Claudine Bombar <>
Submitted on : Tuesday, September 4, 2007 - 11:13:51 AM
Last modification on : Wednesday, September 16, 2020 - 4:23:10 PM

### Citation

B. Aubert, M. Bona, D. Boutigny, Y. Karyotakis, J.P. Lees, et al.. Measurement of the Hadronic Form Factor in $D^0 \to K^- e^+ \nu_e$ Decays. Physical Review D, American Physical Society, 2007, 76, pp.052005. ⟨10.1103/PhysRevD.76.052005⟩. ⟨in2p3-00169504⟩

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