2008/06/30 by Yuan-Jiang Zhang, Qiang Zhao, Q. Zhao +2 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.78.054014
published as Phys.Rev.D78:054014,2008 · revised version to appear in Phys. Rev. D
arxiv created 2008/08/27 · openalex publication_date 2008/09/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Inspired by the obvious discrepancies between experiment and nonrelativistic QCD (NRQCD) studies of e+e^\ensuremath-\ensuremath→J/\ensuremathψ+\ensuremathηc at √(s)\ensuremath≃10.6 GeV, we investigate contributions from intermediate meson loops as long-range interaction transitions to this process. The intermediate meson loops include DD(D*), DD* (D or D*), D*D*(D), and corresponding Ds intermediate mesons. With the constraints from experimental data on the vertex couplings, we find that the intermediate meson loops account for 2.7\ensuremath∼6.7 fb of the cross sections within a reasonable range of cutoff energies of the factor parameter. We also investigate contributions from the absorptive part and find that it accounts for approximately 0.58\ensuremath∼1.38 fb. These results imply that contributions from long-range interaction transitions may still play a role in such an energy region.