2016/01/16 by Zhi-Qing Zhang, Siyang Wang, Si-Yang Wang +1
Physics and Astronomy · #Branching fraction #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.93.054034
published as Phys. Rev. D 93, 054034 (2016) · 15 pages, 4 figures
arxiv created 2016/01/16 · openalex publication_date 2016/03/21 · arxiv updated 2016/03/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Through analyzing the B(s) charmed decays B0\ensuremath→D0f0(980) and Bs\ensuremath→D0f0(980) within the framework of the perturbative QCD factorization approach and comparing with the current data, we find that there are two possible regions for the f0(980)\ensuremath-f0(500) mixing angle \ensuremathθ: one is centered at 34\ifmmode^∘\else\textdegree\fi--38\ifmmode^∘\else\textdegree\fi and the other falls into 142\ifmmode^∘\else\textdegree\fi--154\ifmmode^∘\else\textdegree\fi. The former can overlap mostly with one of the allowed angle regions extracted from the decay B0\ensuremath→D0f0(500). The branching fractions of Bs decay modes are less sensitive to the mixing angle compared with those of B decay modes. Especially, for the decay Bs\ensuremath→D0f0(980), its branching fraction changes only slightly between (1.2--1.8)\ifmmode×\else\texttimes\fi10^\ensuremath-7 when the mixing angle \ensuremathθ runs from 0\ifmmode^∘\else\textdegree\fi to 180\ifmmode^∘\else\textdegree\fi. All of our results support the picture that the f0(980) is dominated by the two-quark component in the B decay dynamic mechanism. Furthermore, the ss component is more important than the qq=(uu+dd)/√(2) component. This point is different from f0(500)/\ensuremathσ. Last but not least, our picture is not in conflict with the popular four-quark explanation.