How Hard Are the Form Factors in Hadronic Vertices with Heavy Mesons?

Details How Hard Are the Form Factors in Hadronic Vertices with Heavy Mesons? How Hard Are the Form Factors in Hadronic Vertices with Heavy Mesons?

2000-10-26

arxiv.org/abs/hep-ph/0010302v1

Phys.Lett. B498 (2001) 169-178

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, RevTeX including 5 figures in ps files

Scientific paper

10.1016/S0370-2693(01)00011-9

The $ND\Lambda_c$ and $ND^*\Lambda_c$ form factors are evaluated in a full QCD sum rule calculation. We study the double Borel sum rule for the three point function of one meson one nucleon and one $\Lambda_c$ current up to order six in the operator product expansion. The double Borel transform is performed with respect to the nucleon and $\Lambda_c$ momenta, and the form factor is evaluated as a function of the momentum $Q^2$ of the heavy meson. These form factors are relevant to evaluate the charmonium absorption cross section by hadrons. Our results are compatible with constant form factors in these vertices.

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