Meson loops and the $g_{D^* D π}$ coupling

Details Meson loops and the $g_{D^* D π}$ coupling Meson loops and the $g_{D^* D π}$ coupling

2004-03-05

arxiv.org/abs/hep-ph/0403064v1

Braz.J.Phys. 36 (2006) 1232-1237

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, RevTex, 6 eps figures

Scientific paper

The $D^*D\pi$ form factor is evaluated at low and moderate $Q^2$ in a hadronic loop model, for off-shell $D$ mesons. The results contain arbitrary constants, which are fixed so as to match previous QCD sum rule calculations valid at higher $Q^2$. The form factor obtained in this way was used to extract the coupling constant, which is in very good agreement with the experimental value.

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