# Measurement of the $q^2$ dependence of the Hadronic Form Factor in $D^0 \to K^- e^+ \nu_e$ decays

Abstract : We present a preliminary measurement of the q2 dependence of the D0 --> K- e+ nu_e decay rate. This rate is proportional to the hadronic form factor squared, specified by a single parameter. This is either the mass in the simple pole ansatz m_pole = (1.854 +- 0.016 +- 0.020) GeV/c2 or the scale in the modified pole ansatz alpha_pole = 0.43 +- 0.03 +- 0.04. The first error refers to the statistical, the second to the systematic uncertainty.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00118708
Contributor : Dominique Girod <>
Submitted on : Wednesday, December 6, 2006 - 11:21:55 AM
Last modification on : Wednesday, September 16, 2020 - 4:18:32 PM

### Citation

B. Aubert, R. Barate, M. Bona, D. Boutigny, F. Couderc, et al.. Measurement of the $q^2$ dependence of the Hadronic Form Factor in $D^0 \to K^- e^+ \nu_e$ decays. 33rd International Conference on High-Energy Physics, ICHEP 06, Jul 2006, Moscou, Russia. ⟨in2p3-00118708⟩

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