$g_{NDΛ_{c}}$ from QCD Sum Rules

Details $g_{NDΛ_{c}}$ from QCD Sum Rules $g_{NDΛ_{c}}$ from QCD Sum Rules

1998-03-26

arxiv.org/abs/hep-ph/9803467v1

Phys.Lett. B443 (1998) 285-292

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, Latex, 5 ps figures

Scientific paper

10.1016/S0370-2693(98)01247-7

The $ND\Lambda_c$ coupling constant is evaluated in a full QCD sum rule calculation. We study the Borel sum rule for the three point function of one pseudoscalar one nucleon and one $\Lambda_c$ current up to order seven in the operator product expansion. The Borel transform is performed with respect to the nucleon and $\Lambda_c$ momenta, which are taken to be equal, whereas the momentum $q^2$ of the pseudoscalar vertex is taken to be zero. This coupling constant is relevant in the meson cloud description of the nucleon which has been recently used to explain exotic events observed by the H1 and ZEUS Collaborations at HERA.

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