Eur. Phys. J. C (2010) 67: 163-172
https://doi.org/10.1140/epjc/s10052-010-1285-7

Regular Article - Theoretical Physics

Study of scalar meson f ₀(980) from B→f ₀(980)K ^* decays

Department of Physics, Henan University of Technology, Zhengzhou, Henan, 450052, P.R. China

^* e-mail: zhangzhiqing@haut.edu.cn

Received: 20 January 2010
Revised: 28 February 2010
Published online: 23 March 2010

Abstract

In this paper, the branching ratios and the direct CP-violating asymmetries for decays and B ⁻→f ₀(980)K ^*− by employing the perturbative QCD factorization approach are studied. In the two-quark model supposition, f ₀(980) is commonly viewed as a mixture of and , that is , where θ is the f ₀−σ mixing angle. We find that the non-factorizable f ₀ emission type diagrams can give large contributions to the final results, which are consistent with the present experimental data and the upper limit in the allowed mixing angle ranges. We predict that the direct CP asymmetry is small, only a few percent, which can be tested by future B factory experiments.