Charm meson resonances in $D \to P \ell ν$ decays

Details Charm meson resonances in $D \to P \ell ν$ decays Charm meson resonances in $D \to P \ell ν$ decays

2004-12-10

arxiv.org/abs/hep-ph/0412140v3

Phys.Rev.D71:014020,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 4 figures; minor corrections, added some discussion, version as published

Scientific paper

10.1103/PhysRevD.71.014020

Motivated by recent experimental results we reconsider semileptonic $D \to P \ell \nu_{\ell} $ decays within a model which combines heavy quark symmetry and properties of the chiral Lagrangian. We include excited charm meson states, some of them recently observed, in our Lagrangian and determine their impact on the charm meson semileptonic form factors. We find that the inclusion of excited charm meson states in the model leads to a rather good agreement with the experimental results on the $q^2$ shape of the $F_+(q^2)$ form factor. We also calculate branching ratios for all $D \to P \ell \nu_{\ell} $ decays.

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