The strong coupling constant $g_{D^* D π}$ and final-state interactions

Details The strong coupling constant $g_{D^* D π}$ and final-state interactions The strong coupling constant $g_{D^* D π}$ and final-state interactions

2007-09-14

arxiv.org/abs/0709.2295v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 1 figure

Scientific paper

In this article, we study the contribution from the final-state interactions to the strong coupling constant $g_{D^* D \pi}$. We take an assumption that the momentum transfers in the strong decay $D^{*+} \to D^0 \pi^+$ be large to validate the operator product expansion in the light-cone QCD sum rules. At large momentum transfers, the final-state interactions play an important role, and we should take them into account.

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