gNDΛc from QCD sum rules

1998/03/26 by F. S. Navarra, M. Nielsen · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0370-2693(98)01247-7

published as Phys.Lett. B443 (1998) 285-292 · 9 pages, Latex, 5 ps figures

arxiv created 1998/03/26 · openalex publication_date 1998/12/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The NDΛ_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 Λ_c current up to order seven in the operator product expansion. The Borel transform is performed with respect to the nucleon and Λ_c momenta, which are taken to be equal, whereas the momentum q² 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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• Nuclear-bound quarkonia and heavy-flavor hadrons
• SU(4) flavor symmetry breaking in D-meson couplings to light hadrons