2009/07/31 by Zhi-Gang Wang, Zhi-Cheng Liu, Xiao-Hong Zhang
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-009-1156-2
published as Eur.Phys.J.C64:373-386,2009 · 19 pages, 36 figures, slight revision
arxiv created 2009/08/25 · openalex publication_date 2009/09/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this article, we assume that there exist scalar D^∗ D^∗, Ds^∗ Ds^∗, B^∗ B^∗ and Bs^∗ Bs^∗ molecular states, and study their masses using the QCD sum rules. The numerical results indicate that the masses are about (250-500) \rmMeV above the corresponding D^∗ - D^∗, Ds^∗ - Ds^∗, B^∗ - B^∗ and Bs^∗ - Bs^∗ thresholds, the Y(4140) is unlikely a scalar Ds^∗ Ds^∗ molecular state. The scalar D^∗ D^∗, Ds^∗ Ds^∗, B^∗ B^∗ and Bs^∗ Bs^∗ molecular states maybe not exist, while the scalar D'^∗ D'^∗, D's^∗ D's^∗, B'^∗ B'^∗ and B's^∗ B's^∗ molecular states maybe exist.