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arXiv · hep-ph/0109188

$D^*Dπ$ form factor revisited

F. S. Navarra·M. Nielsen·M. E. Bracco
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Abstract

The $D^*Dπ$ form factor is evaluated in a QCD sum rule calculation for both $D$ and $π$ off-shell mesons. We study the Borel sum rule for the three-point function of one pseudoscalar, one axial and one vector meson currents. We find that the momentum dependence of the form factors is very different if the $D$ or the $π$ meson is off-shell, but they lead to the same coupling constant in the $D^*Dπ$ vertex.

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F. S. Navarra, M. Nielsen, M. E. Bracco. 2001-09-20. $D^*Dπ$ form factor revisited. https://doi.org/10.1103/physrevd.65.037502

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