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arXiv · 1003.2604

$D^{*}D ρ$ vertex from QCD sum rules

B. Osorio Rodrigues·M. E. Bracco·M. Nielsen·F. S. Navarra
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Abstract

We calculate the form factors and the coupling constant in the $D^{*}D ρ$ vertex in the framework of QCD sum rules. We evaluate the three point correlation functions of the vertex considering both $ D $ and $ ρ$ mesons off--shell. The form factors obtained are very different but give the same coupling constant: $g_{D^{*}D ρ} = 4.1 \pm 0.1$ GeV$^{-1}$.

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B. Osorio Rodrigues, M. E. Bracco, M. Nielsen, F. S. Navarra. 2010-03-12. $D^{*}D ρ$ vertex from QCD sum rules. https://doi.org/10.1016/j.nuclphysa.2011.01.001

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