In this talk, I would like to present our recent study of the D⁺_s→π⁺(a₀(980)⁰→)π⁰η, π⁰(a₀(980)⁺→)π⁺η decays, which have been recently measured by the BESIII collaboration. We propose that D⁺_s→π⁺⁽⁰⁾(a₀(980)⁰⁽⁺⁾→)π⁰⁽⁺⁾η receives the main contribution from the triangle rescattering process, where η and ρ⁺ in D⁺_s→ηρ⁺, by exchanging π⁰⁽⁺⁾, are formed as a₀(980)⁰⁽⁺⁾ and π⁺⁽⁰⁾, respectively.  Accordingly, we calculate that β(D⁺_s→a₀(980)⁰⁽⁺⁾π⁺⁽⁰⁾) =(1.7±0.4)×10⁻² and β(D⁺_s→π⁺⁽⁰⁾(a₀(980)⁰⁽⁺⁾→)π⁰⁽⁺⁾η) = (1.5±0.3)×10⁻², in agreement with the data.

萧佑国，台湾大学博士，台湾清华大学理论中心研究学者。于2006-2007年在加拿大 TRIUMF 国家实验室任职访问科学家。重庆海外百人计划与山西百人计划入选者，现为山西师范大学物信学院特聘全职教授。在国际顶级期刊发表学术论文约60篇，同时是多个国际著名期刊审稿人。主要专长是粒子物理唯象学，研究粲强子衰变、底夸克重子衰变，重子型B介子衰变，与相关的CP破坏、时间反演破坏、三体与四体衰变的角分布分析；同时探究四、五夸克态与胶球共振态。