2006/06/29 by Z. G. Wang, Shaolong Wan, S. L. Wan · 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:10.1103/physrevd.74.014017
published as Phys.Rev.D74:014017,2006 · 31 pages, 21 figures, 2 tables, Second version
arxiv created 2006/06/29 · openalex publication_date 2006/07/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this article, we analyze the vertices D*DsK, Ds*DK, D0DsK, and Ds0DK within the framework of the light-cone QCD sum rules approach in an unified way. The strong coupling constants G_D*DsK and G_Ds*DK are important parameters in evaluating the charmonium absorption cross sections in searching for the quark-gluon plasmas. Our numerical values of the G_D*DsK and G_Ds*DK are compatible with the existing estimations although somewhat smaller; the SU(4) symmetry breaking effects are very large, about 60%. For the charmed scalar mesons D0 and Ds0, we take the point of view that they are the conventional cu and cs mesons, respectively, and calculate the strong coupling constants G_D0DsK and G_Ds0DK with the vector interpolating currents. The numerical values of the scalar-DsK and scalar-DK coupling constants G_D0DsK and G_Ds0DK are compatible with the existing estimations---the large values support the hadronic dressing mechanism. Furthermore, we study the dependence of the four strong coupling constants G_D*DsK, G_Ds*DK, G_D0DsK, and G_Ds0DK on the nonperturbative parameter a4 of the twist-2 K meson light-cone distribution amplitude.