2009/07/31 by Hong-Wei Ke, Xue-Qian Li, Zheng-Tao Wei · 1 citation
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.80.074030
published as Phys.Rev.D80:074030,2009 · 13pages, 3 figures; some changes were made, references added. Accepted by PRD
arxiv created 2009/10/07 · openalex publication_date 2009/10/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
Only two isospin-singlet scalar mesons f0(600) (\ensuremathσ) and f0(980) exist below 1 GeV, so that it is natural to suppose that they are two energy eigenstates which are mixtures of (1)/(√(2))(uu+dd) and ss. Is this picture right? Generally, it is considered that f0(600) mainly consists of (1)/(√(2))(uu+dd); if so, the dominant component of f0(980) should be ss. The recent measurement of the CLEO Collaboration on the branching ratio of Ds\ensuremath→f0(980)e+\ensuremathνe provides an excellent opportunity to test the structure of f0(980), namely, whether the data can be understood as long as it consists of mainly the conventional qq structure. We calculate the form factors of Ds\ensuremath→f0(980) in the light-front quark model and the corresponding branching ratio of the semileptonic decay. By fitting the data, we obtain the mixing angle \ensuremathφ. The obtained mixing angle shows that the ss component in f0(980) may not be dominant.