The $J/ψD D$ Vertex in QCD Sum Rules

Details The $J/ψD D$ Vertex in QCD Sum Rules The $J/ψD D$ Vertex in QCD Sum Rules

2002-06-20

arxiv.org/abs/hep-ph/0206198v1

Phys.Lett. B541 (2002) 265-272

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, Latex, 4 eps figures

Scientific paper

10.1016/S0370-2693(02)02259-1

The $J/\psi D D$ form factor is evaluated in a QCD sum rule calculation for both $D$ and $J/\psi$ off-shell mesons. We study the double Borel sum rule for the three point function of two pseudoscalar and one vector meson current. We find that the momentum dependence of the form factors is different if the $D$ or the $J/\psi$ meson is off-shell, but they lead to the same coupling constant in the $J/\psi D D$ vertex.

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