2021/04/30 by Ri-Qing Qian, Jun-Zhang Wang, Xiang Liu +1
Physics and Astronomy · #Bar (unit) #Branching fraction #Hadron #High-Energy Particle Collisions Research #Lambda #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.104.094001
published as Phys. Rev. D 104, 094001 (2021) · 8 pages, 6 figures and 4 tables. Accepted by Phys. Rev. D
arxiv created 2021/10/13 · openalex publication_date 2021/11/03 · arxiv updated 2021/11/04 · openalex created_date 2021/11/08 · openalex updated_date 2026/08/05
In this work, we investigate the open-charm decay process \ensuremathψ\ensuremath→\mathrm\ensuremathΛc\mathrm\ensuremathΛc via the hadronic loop mechanism for vector charmonia above \mathrm\ensuremathΛc\mathrm\ensuremathΛc threshold. The branching ratios of these vector charmonium states to \mathrm\ensuremathΛc\mathrm\ensuremathΛc are estimated. The charmonium explanation of the Y(4630) observed in e+e^\ensuremath-\ensuremath→\mathrm\ensuremathΛc\mathrm\ensuremathΛc is tested. Furthermore, for the predicted higher vector charmonia above 4.7 GeV, the branching ratios B[\ensuremathψ(nS)\ensuremath→\mathrm\ensuremathΛc\mathrm\ensuremathΛc] with n=7, 8, 9 are found to be of the order of magnitude of 10^\ensuremath-4\ensuremath-10^\ensuremath-3 while B[\ensuremathψ(mD)\ensuremath→\mathrm\ensuremathΛc\mathrm\ensuremathΛc] with m=6, 7, 8 are of the order of magnitude of 10^\ensuremath-3\ensuremath-10^\ensuremath-2. The experimental signals of these missing charmonium states are discussed. The search for them may be an interesting topic in the future BESIII and Belle II experiments.